The 4th term of a G.P. is 16 and the 7th term is 128. Find the first term and common ratio of the series
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Answered by
35
ar³=16
ar^6=128
on dividing
r³=8
r=2
substituting it in 1st equation
ar³=16
8a=16
a=2
ar^6=128
on dividing
r³=8
r=2
substituting it in 1st equation
ar³=16
8a=16
a=2
Answered by
25
this is the answer ...hope it will help
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