Question
Mathematics Question on Sequence and series
If the third term of a G.P. is 3, then the product of its first 5 terms is
A
15
B
81
C
243
D
Cannot be determined.
Answer
243
Explanation
Solution
T3=ar2=3 Product of first five terms =a⋅ar⋅ar2,ar3⋅ar4 =a5⋅r10=(ar2)5=(3)5 =243