Find f. (Use C for the constant of the first antiderivative and D for the constant of the second antiderivative.) f ''(x)= 6x +sinx

Step-by-step explanation:

Given that:

We are given the 2nd derivative of a function f(x) and we need to find f(x) from that.

We will have to integrate it twice to find the value of f(x).

Let us have a look at the basic formula of integration that we will use in the solution:

Now, integrating it again to find f(x):

the answer is a if my teacher taught me correct