Suppose that $x > 0$ $x>0$ we have $f (2 x) = \frac{5}{2 + x}$ $f(2x)= 5/(2+x)$ . What is $2 f (x)$ $2f(x)$ ?

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Answer 1 · 2017-06-03T11:43:41

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

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

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

Suppose that x>0x>0x>0 we have f(2x)= 5/(2+x)f(2x)=52+xf(2x)= 5/(2+x). What is 2f(x)2f(x)2f(x)?