Question

If f(x) = 1/x + 2/x,
then f
(1) =

Answer 1

f(1) = 3

Explanation:

replace the x's in f(x) with 1's, so

f(1) = 1/(1) +2/(1)

simplify the fractions, since 1 is on the bottom it's easy

f(1) = 1 + 2

add

f(1) = 3

Answer 2

f(1)=3

Explanation:

Given that f(x)=1/x+2/x

and substitute x=1

f(1)=1/1+2/1

=3

Hope it helps....