Calculus
posted by Help .
g(x)=[(4x7)(x+11)]
Find g'(x)
I thought that you use the product rule but I have the answer and I am not getting the same thing.
The answer is
g'(x)=3/2[4x^2+37x77]^1/2 * (8x+37)
I keep getting just 8x+37 when I do the product rule. What am I missing?

Calculus 
Reiny
If the question is the way you stated it, then the derivative is indeed 8x  37
judging from the answer that "they" give your question must have been
g(x)=[(4x7)(x+11)]^(3/2), (they expanded the inside first). 
Calculus 
Ana
You have to use the FOIL rule that stands for first,outer, inner and last.
So look at the two equatons:
(4x7)(x+11) Firt stands for the multiplication of 4x and x in which are the first number of the equation,next outer means that you now multiply the outer numbers being 4x and 11. Thirdly, inner stands for the multiplication of the two inner numbers being 7 and x. At last you multiply the last two numbers of each equation being 7 an 11. If you do it in order you will get 4x^2+44x7x77 than you simplify the two like terms being 44x7x in which it gives you 37x, So your answer will be 4x^2+37x77.
Respond to this Question
Similar Questions

Algebra
 ok... we keep getting this one wrong: Solve the following equation for x. Write your answer as a fraction in simplest form. 6(x5)=2x86(3x5) What is it you don't understand about this? 
Calculus
This is a problem we did previously on a test; my answer was marked correct, but I am having trouble getting my answer in the same form that my teacher gave it. The question: Find the derivative of (x/(x+1))^1/2 His answer: ( (x(x+1))^(1/2) … 
Calculus I
Hi, I'm trying to figure this out, but the answer I keep coming up with is incorrect. Can anyone help me out? 
Calculus
Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: 1/x but I keep getting: 1/x^2 what do I have to do to get that answer? 
Calculus
Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: 1/x but I keep getting: 1/x^2 what do I have to do to get that answer? 
Calculus
Please help!! I keep solving this problem but I keep getting the wrong answer. Find the derivative of the function: f(x)= xsqrt(x1)/(x+2) 
physics
Find the wavelength (in nm) of a photon whose energy is 5.90 x 1019 J. I understand that I have to use this equation to figure out the problem E=nhf, I just keep getting the wrong answer. Which is 33.68 nm 
Calculus
Use implicit differentiation to find dy/dx. e^4x = sin(x+2y). This is a practice problem. It says the correct answer is 4e^x/(2sin(x+2y)) but I keep getting 4e^(4x)/(2cos(x+2y)). I thought the derivative of e^(4x) would be 4e^(4x), … 
Calculus I
Hello! I am not sure why I am getting this problem wrong, and I keep getting six. Could someone be kind enough to show me how it's done? 
Physics
a ball is dropped from the top on an 80m high building. what speed does the ball have in falling 3.5 s?