Suppose that x>0 we have f(2x)= 5/(2+x). What is 2f(x)?

1 Answer
Jun 3, 2017

:.2f(x) =20/(4+x)

Explanation:

f(2x) = 5/(2+x) :. f(x) = f( 2*(x/2)) = 5/(2+x/2)=10/(4+x)

:.2f(x) =2*10/(4+x) = 20/(4+x) [Ans]