1.

The sum of an infinite GP is 18. If the first term is 6, the common ratio is …(a) 1/3(b) 2/3(c) 1/6(d) 3/4

Answer»

(b) 2/3 

6/(1 - r) =  18 

6 = 18 - 18r

18r = 18 – 6 = 12 

r = 12/18 = 2/3



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