ANSWER

EXPLANATION
The given function is

We take natural log of both sides;

Recall and use the product rule of logarithms.

This implies that:


We now differentiate implicitly to obtain;

Multiply through by y,

Substitute y=x²cosx to obtain;

Expand:

(q ° r) = -32
(r ° q) = 101
I need to know the question that tells us what the other parts are.
y - 3x = 7
can be written as
y = 3x + 7
For every value of x there is a unique value of y. For example when x = 0 y = 3(0) + 7 = 7
Yes it is a function.
In particular it is a one-to-one function.