document.write( "Question 977412: Find the common ratio when a2 = 64 and a5 = 8. \n" ); document.write( "
Algebra.Com's Answer #598988 by anand429(138)\"\" \"About 
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As per standard GP notation
\n" ); document.write( "a*r = a =64 -(i)
\n" ); document.write( "and,
\n" ); document.write( "a*r^4 = a5 = 8 -(ii)
\n" ); document.write( "Dividing (ii) by (i)
\n" ); document.write( "r^3 = 1/8
\n" ); document.write( "i.e. r = 1/2
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