Question

If f(x+5)=f(x)+f(5),prove that :
(i) f(5) +f (-5) = 0
(ii)f(10) =2f(5)

Answer 1

Answer:

(I)

Put x = -5

f(-5+5) = f(-5) + f (5)

f(-5) + f (5) = 0

(II)

Put x = 5

$f(5 + 5) = f(5) + f(5) \\ f(10) = 2f(5)$

Answer 2

Step-by-step explanation:

the composite of f Ang g denoted by f g is defined