# Yahoo Web Search

1. ### I have done this problem so many times. What am I doing wrong? Could anyone help? Thanks!?

...'s see what I get. dy/dx = dy/du * du/dx we have: y = √(5u) and u = sin(x/5) to get dy/du, we need to chain rule that: y = √v and v = 5u dy/du = dy...

3 Answers · Science & Mathematics · 20/10/2020

2. ### Can anyone help me? I have tried many derivatives of xcos(x) but got them all wrong?

y = uv y' = uv' + u 'v Let u = x Let v = cos x y' = x * (-sin x) + 1 * cos x y...

2 Answers · Science & Mathematics · 19/10/2020

3. ### Help understanding Probability ...?

Although P([I’ U S’] ∩ [I U S]) would make sense, P([I’ U ...

2 Answers · Science & Mathematics · 18/10/2020

4. ### hard estimation math?

... in the United States and is the main product that U .S. oil refineries produce. 0.1 mile = 160 m 140e9 gallons...

2 Answers · Science & Mathematics · 18/10/2020

5. ### Find derivative?

...multoplication sign .. if not then this is wrong this is a product rule problem   u = (3x^2+5)^3   du/dx =  3*(6x)(3x^2+5)^2   v = (5x^4+2)^2   dv/dx = 2*(20x)(5x...

2 Answers · Science & Mathematics · 17/10/2020

6. ### Find the derivative of the function. g(x) = √x2 – 16x + 64?

...simply the absolute value un the unsquared value.  That is, √(u²) = | u | for any real number u .  So:     g(x) = |x - 8| Write that...

4 Answers · Science & Mathematics · 13/10/2020

7. ### How to solve 2sqrt(xy)+y+xy'=0?

... like your answer is wrong. 2 * sqrt(xy) + y + xy' = 0 u = sqrt(x * y) u ^2 = x * y 2u * u ' = x * y' + y 2u * u ' - y = x * y'...

2 Answers · Science & Mathematics · 13/10/2020

8. ### Can anyone solve this math problem  for me plz plz. Solve the y’’=(y’)^2     Thx thx. ?

We see that if we let u = y', we get a 1st order DE: u ' = u². IWO, du...

2 Answers · Science & Mathematics · 13/10/2020

9. ### derivatives problem?

f(x) = sin^2[e^sin^2(x)]; Put u = e^sin^2(x),,,(1); f(x) = sin^2( u ); (du/dx) = u *2sin(x)*cos(x) = u *sin(2x); (df/dx) = (df/du)(du/dx); (df/du) = 2sin( u )*cos( u ) = sin(2u); (df/dx) = u *sin(2u)sin(2x) where u is define in (1) above.

2 Answers · Science & Mathematics · 12/10/2020

10. ### derivative of (x^2 + 4x) ^(1/3)?

... the chain rule: y = (x² + 4x)^(1/3) Set this up as: y = u ^(1/3) and u = x² + 4x The chain rule is: dy/dx = dy/du * du...

8 Answers · Science & Mathematics · 13/10/2020