[] |
[] ΰ īī |
ȫâ |
2021-05-20 |
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[] ΰ īī |
ۼ |
ȫâ |
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2021-05-20 |
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ȳϼ, ȫâ Դϴ.
ΰ е
īī Դϴ.
*
1. īī忡 ̵ ߰
ȫâ īī ̵ : hongdly
2. , ϰ ִ Ǹ / ֽñ ٶϴ.
մϴ. |
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2745 |
3 34 |
baesohee8** |
2019-11-15 |
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3 34 |
ۼ |
baesohee8** |
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2019-11-15 |
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176 ε,,,,
f(t^3 - t +1 , 2 - t^2 ) = t^4 -4t^3 + 4t + 6 ⼭ t^3 - t + 1 x ġȯϴµ ̰ x ,y ٲ㼭 ؾߵdz???
Ģ ִ° ƴѰ??? Ģ Ҽ ˷ּ. |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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f(x,y)=g(t) x , y t Լ̹Ƿ f x ̺ Ģ Ұմϴ. |
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2744 |
378p 53 |
thdtkddlr0** |
2019-11-15 |
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378p 53 |
ۼ |
thdtkddlr0** |
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2019-11-15 |
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ؼ l=-r 떄 ƴѰ?.. 3r شȵ..
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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l, r ̹Ƿ l=-r 踦 ϴ.
3r=l ؼ ½ϴ. |
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2743 |
374p 37 |
thdtkddlr0** |
2019-11-15 |
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374p 37 |
ۼ |
thdtkddlr0** |
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2019-11-15 |
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f'(x)=0̷ e^x-1/x^2=0ε, ⼭ x ϳ?
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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Ȯ x մϴ.
Ѵٴ ֽϴ. |
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2742 |
P147 5 |
bsh09** |
2019-11-15 |
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P147 5 |
ۼ |
bsh09** |
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2019-11-15 |
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Y2 ϴ 1 ̺й ̿ϼ̴µ d/dt(Y2)=(2/100)Y1-0.02Y2 (50D+1)Y2=Y1 ̿ϸ ȵdz? Ȱ ȳͼ 帳ϴ. |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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մϴ. |
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2741 |
P145 н2 |
bsh09** |
2019-11-15 |
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P145 н2 |
ۼ |
bsh09** |
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2019-11-15 |
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Yp=1/D(D^2+4)(t^2+2t) 1/D ؼ 1/(D^2+4) {(1/3)t^3+t^2} Ǯµ -1/8 . ó 1/(D^2+4) óϰ 1/D óϴ° ΰ??? |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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ϴ.
-1/8 c_1 ԵǹǷ Ϲؿ ʽϴ. |
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2740 |
Լ 11 53д |
vtor** |
2019-11-15 |
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Լ 11 53д |
ۼ |
vtor** |
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2019-11-15 |
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⼭ ΰ ϶ ؼ Ǫ° ƴѰ? 鵵 Ǵ°ǰ? 鵵 Ϻΰǰ?? Ǭǰ??? |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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鵵 Դϴ. Ǯ ˴ϴ. |
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2739 |
338p 49 |
thdtkddlr0** |
2019-11-14 |
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338p 49 |
ۼ |
thdtkddlr0** |
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2019-11-14 |
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a>0 ڽϴ.. f(x)=0 ϱ f(0)<0 f(1)>0̾ ش, ؼҸ ƴѰ? ِ ٸ.. |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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f ' ̸ x>0 f ' DZ
f '(0)<0 ̾ մϴ. f'(0) ϴ Ī ̿Ͽ f'(1)<0 ̿մϴ. |
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2738 |
P135 ̺й : ġ ߱ |
bsh09** |
2019-11-14 |
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P135 ̺й : ġ ߱ |
ۼ |
bsh09** |
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2019-11-14 |
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̺й ΰ 28д뿡 Xe^(t)+tXe^(t)+Ue^(t) = AtXe^(t)+ AUe^(t) (⼭ ) Ŀ A=̹Ƿ tXe^(t) AtXe^(t) Ұϼ̴µ Ue^(t) AUe^(t) ҰŸ Ͻô ǰ? |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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A ġ 뿡 Ǵ Ͱ X ̹Ƿ AX=X ϱ Ұ
AU=U ƴϹǷ Ұ ϴ. |
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2737 |
ֽϴ |
zerto** |
2019-11-14 |
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ֽϴ |
ۼ |
zerto** |
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2019-11-14 |
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⼭ ln2 - 1/2 ln2 1/2 ln2 ̷ Ǵ ڽϴ . ڼ ־ ڽϴ.
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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1*ln2 - 1/2*ln2 = 1/2*ln2 ˴ϴ. |
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2736 |
436p 4 |
thdtkddlr0** |
2019-11-14 |
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436p 4 |
ۼ |
thdtkddlr0** |
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2019-11-14 |
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y=a϶, x=ø2a ƴѰ? 3̶ 1/3 µ.. |
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亯Դϴ. |
haeun8** |
2019-11-18 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-18 |
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x=ø2a 1/3 -3 մϴ. |
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2735 |
ϱ(ټ Լ) 23 Դϴ. |
sfhsfh1** |
2019-11-14 |
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ϱ(ټ Լ) 23 Դϴ. |
ۼ |
sfhsfh1** |
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2019-11-14 |
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23 23:00п մϴ.
ټ Լ ϴ ߴٸ F1 x ϸ -2arctan(x/y) F2 y ϸ 2arctan(y/x) ɴϴ. ߿Ѱ ټ Լ ϴ ˴ϴ. Լ 2 µ Ȱ ݾƿ ׳ Ǯ f(x,y) = -2arctan(x/y) + 2arctan(y/x) ݾƿ -arctan(x/y) = arctan(y/x) (1,0) (0,1) κ ϱ ᱹ '2' ɴϴ...
ٸ ϱ... ƴϸ Ǫ Ϻ ʾƼ ̷ ɱ... |
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亯Դϴ. |
haeun8** |
2019-11-17 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-17 |
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켱 (0,0) ҿ̹Ƿ ټԼ ̿Ͽ ϴ.
ټ Լ , κ ״
F1 x F2 x ԵǾ ִ y մϴ.
F2 ʽϴ. |
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2734 |
Լ 9 44д |
vtor** |
2019-11-13 |
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Լ 9 44д |
ۼ |
vtor** |
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2019-11-13 |
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⼭ z/x *(-2u) ̺ ѹ Ҷ yؼ ̺ ϴ°ǰ ߰? |
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亯Դϴ. |
haeun8** |
2019-11-17 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-17 |
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z_x x,y Լ̹Ƿ
Լ Ģ ؾ մϴ. |
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2733 |
P125 18 |
bsh09** |
2019-11-13 |
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P125 18 |
ۼ |
bsh09** |
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2019-11-13 |
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ؼ ̺й °ǰ?? ΰǰ? |
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亯Դϴ. |
haeun8** |
2019-11-16 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-16 |
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ƴ 뿡 ϴ
־ ϱϴ ϴ. |
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2732 |
Լ 7 47д |
vtor** |
2019-11-13 |
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Լ 7 47д |
ۼ |
vtor** |
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2019-11-13 |
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⼭ t ϴ°? |
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亯Դϴ, |
haeun8** |
2019-11-16 |
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亯Դϴ, |
ۼ |
haeun8** |
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2019-11-16 |
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s ̺ ϴ ̱ t մϴ. |
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2731 |
Լ 6 25д |
vtor** |
2019-11-13 |
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Լ 6 25д |
ۼ |
vtor** |
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2019-11-13 |
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193p ǥ2 ófx(0,0) Ǯʰ fx(0,y) Ǫ°? ̺ Ҷ ϰ ̺ ϶ Ͻ̳? |
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亯Դϴ. |
haeun8** |
2019-11-16 |
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亯Դϴ. |
ۼ |
haeun8** |
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2019-11-16 |
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Ǯ ϰ ̺ ϴ Դϴ.
fxy(0,0) Ǹ ̿ , fx(0,h) ʿϹǷ fx(0,y) մϴ, |
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