Question

if f (x)=2x^+3x+2/x^+1,then find f (1/x) is.
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Answer 1

Step-by-step explanation:

soln:

Given;

f(x)=2x^+3x+2/x^+1

f(1/x)=?

Now;

f(1/x)={2(1/x)^+3(1/x)+2}/{(1/x)^+1}

={(2/x^)+(3/x)+2}/}/{(1/x^)+1}

=[{ 2+3x+2x^}/x^]/[{1+x^}/x^] :(x^/x^=1)

=2x^+3x+2/x^+1