Question 363172

{{{f(x)=(Ax)/(x+B)}}}
{{{f(h)=(Ah)/(h+b)}}}
.
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{{{G=f(h)}}}
{{{G=(Ah)/(h+b)}}}
{{{G=(Ax^2)/(x^2+b)}}}
.
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{{{(x^2)/(x^2+4)=(Ax^2)/(x^2+B)}}}
Comparing,
{{{A=1}}}
{{{B=4}}}