How do you solve this function? When x=(a+2).

Question

$f (x) = 3 (x + 5) + \frac{4}{x}$ $f(x)=3(x+5)+4/x$

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Answer 1 · 2018-01-10T06:48:56

See below

Simply, substitute the value of x in the given equation,

$f (a + 2) = 3 (a + 2 + 5) + \frac{4}{a + 2}$ $f(a + 2) = 3(a + 2 +5) + 4/(a +2)$

$\Rightarrow f (a + 2) = 3 a + \frac{4}{a + 2} + 21$ $=> f(a + 2) = 3a + 4/(a + 2) + 21$

You can also simplify it further as per your requirement.