Math, asked by prathameshpimppe7jg6, 1 year ago

if t8=640,r=2,find a

Answers

Answered by noor0

4

I think you question is incomplete.....

noor0: fine

noor0: why,,,,

Answered by sansldnson

3

Answer:

a=5

Step-by-step explanation:

t8=640 ; r=2

t8=ar^7

bcoz, tn=ar^n-1

640=a 2^7

a=640/218

therefore,

a=5..........

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