DIRECTIONS for the question:Solve the following question and mark the best possible option.
If third term of G.P. is 7 then product of its first five terms is
A)
55
B)
75
C)
86
D)
95
E)
None of these
B
Let ‘a’ be the first term and ‘r’ be the common ratio. So T3 = ar2 = 7. Now we have product of first five terms = a× ar × ar2 × ar3 × ar4 = a5r10 = (ar2)5 = 75.