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Find the value of  b given that
b/7+b^2/7^2+b^3/7^3.....=1

 Jul 6, 2022
 #1
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Sum of an infinite series =

 

[ First term ]  / [ 1 -common ratio]         

 

common ratio =  1/7

 

(b/7) / [ 1 - 1/7 ]  =  1

 

(b/7) / (6/7)  = 1

 

b / 6 =   1

 

b =  6

 

cool cool cool 

 Jul 6, 2022

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