Progression (Sequence and Series)Easy
Question
Fifth term of a GP is 2, then the product of its 9 terms is
Options
A.256
B.512
C.1024
D.none of these
Solution
ar4 = 2
a × ar × ar2 × ar3 × ar4 × ar5 × ar6 × ar7 × ar8
= a9 r36 = (ar4)9 = 29 = 512
a × ar × ar2 × ar3 × ar4 × ar5 × ar6 × ar7 × ar8
= a9 r36 = (ar4)9 = 29 = 512
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