Question

Is the following true of false?
d^2/dx^2=(x^2(cosx))= 2cos(x)-4xsin(x)-x^2cos(x)

Answer 1

post the original problem, please. What is f(x)??

Answer 2

This is the original question

Answer 3

oh I think she didn't mean to put an equal sign between the operator and what she was trying to differentiate

Answer 4

thx freckle for helping me

Answer 5

there is no f(\(x\))

Answer 6

\[\frac{d^2}{dx^2}(x^2 \cos(x))\]


I think this is what she meant by the original problem

Answer 7

ya

Answer 8

Yes thats right

Answer 9

we first need to find the first derivative
and you used the product rule?
can I see what you got for this step

\[\frac{d}{dx}(\frac{d}{dx}(x^2\cos(x)))\]

Answer 10

No its asking if what they got for the problem after applying chain rule is true or false.

Answer 11

ok well we can differentiate twice to see

Answer 12

And I think it is true because when you apply chain rule you do get what they got

Answer 13

yup

Answer 14

Okay thank you!