Question

Given the function f(x) = X-X-2x, on which intervals is f(x) => 0?

Answer 1

we have the following:

`f\mleft(x\mright)=x-x-2x\rightarrow f(x)=-2x`

now, in which interval is greater than or equal to 0

`f\mleft(x\mright)\ge0`

The interval is:

`(-\infty,0)`