document.write( "Question 709347: 1. )what is the inverse equation to A=f(r)= (pi)r^2 , r is >or= 0 ?\r
\n" ); document.write( "\n" ); document.write( "2.) solve: f(g(x)) using f(x)=3x-1 and g(x)=1-x^2 \n" ); document.write( "

Algebra.Com's Answer #436554 by josgarithmetic(39630) $\"\"$ $\"About$

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#1, Inverse of f(r)= (pi)r^2\r
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\n" ); document.write( "\n" ); document.write( "g(r) new function.
\n" ); document.write( " $\"g%28f%28r%29%29=g%28%28pi%2Ar%5E2%29%29%7D++and+%7B%7B%7Bg%28%28pi%2Ar%5E2%29%29=r\"$ \r
\n" ); document.write( "\n" ); document.write( "Also f(g(r))= $\"%28pi%29%2Ag%28r%29%2Ag%28r%29=r\"$
\n" ); document.write( "or more simply, $\"%28pi%29%2A%28g%28r%29%29%5E2=r\"$ \r
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\n" ); document.write( "\n" ); document.write( "That last equation can be solved for g(r),... and there be the inverse of f(r). \n" ); document.write( "

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