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प्रश्न
Find the 7th term of the G.P. 4, 8, 16, ......
बेरीज
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उत्तर
r = `8/4`
= 2
r = `16/8`
= 2
r = 2
a = 4
`a_n = ar^(n - 1)`
`a_7 = ar^(7 - 1)`
a7 = ar6
= (4)(2)6
= 22 × 26
= 28
= 256
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