function problem

[daniyatom]

for which of the following functions is f(a+b)= f(a) + f(b) for all postive numbers a and B
(A) f(x)= x^2
(B) f(x) = x +1
(C) f(x) = x ^1/2
(D) f(x) = 2/X
(E) f(x)= -3x

need help ppl

[parallel_chase]

refer this

https://www.beatthegmat.com/f-a-b-f-a-f-b-t3818.html

[daniyatom]

cheers....thanks