document.write( "Question 351557: Find r if:
\n" ); document.write( "1/r=1/r1+1/r2 \n" ); document.write( "

Algebra.Com's Answer #251185 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"1%2Fr=1%2Fr1%2B1%2Fr2\"$
\n" ); document.write( "Multiply both sides by $\"r%2Ar1%2Ar2\"$ , assuming $\"r%3C%3E0\"$ , $\"r1%3C%3E0\"$ , $\"r2%3C%3E0\"$
\n" ); document.write( " $\"r1%2Ar2=r%2Ar2%2Br%2Ar1\"$
\n" ); document.write( " $\"r%28r1%2Br2%29=r1%2Ar2\"$
\n" ); document.write( " $\"highlight_green%28r=%28r1%2Ar2%29%2F%28r1%2Br2%29%29\"$ \n" ); document.write( "

\n" );