The function defined by f(x) = (x + 7)/(2x + 5) Find f(4x) .

Sovattha Sok asked Aug 2, 2023

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Sovattha Sok asked Aug 2, 2023

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13 votes

Solution:

The question is given below as

$\begin{gathered} f(x)=(x+7)/(2x+5) \\ find, \\ f(4x) \end{gathered}$

Concept:

Substitute x with 4x in the function above

$\begin{gathered} f(x)=(x+7)/(2x+5) \\ f(4x)=(4x+7)/(2(4x)+5) \\ f(4x)=(4x+7)/(8x+5) \end{gathered}$

Hence,

The final answer is

$\Rightarrow f(4x)=(4x+7)/(8x+5)$

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