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If `f(x)=1/(2x+1), x!=-1/2, ` then show that `f(f(x))=(2x+1)/(2x+3)` , provided that `x!=-3/2dot`

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If `f(x)=1/(2x+1), x!=-1/2, ` then show that `f(f(x))=(2x+1)/(2x+3)` , provided that `x!=-3/2dot`
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`f(x)=(1)/((2x+1))impliesf{f(x)}=(1)/({2xx(1)/((2x+1))+1})=(2x+1)/(2x+_3)`.
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