Question

8

Answer 1

I think you wrote (f-f)(x) 0 wrong. Try to write it again.

Answer 2

[Subtle Hint]
for ANY two functions f and g of x...
(f+g)(x) = f(x) + g(x)

Answer 3

I did not write it wrong. @DanielM_113
That's how it was written

and @terenzreignz - ?

Answer 4

Ok, the you should follow terenzreignz hint. For the subtraction you just "add" -f(x).

Answer 5

[Strong Hint]
Take f(x) = g(x)
So..
if
(f+g)(x) = f(x) + g(x)
(f-g)(x) = f(x) - g(x)
(f-f)(x) = ?

Answer 6

gero