Find s infinite 7,-1, 1/7, -1/49 please explain – InterviewSolution

1.

Find s infinite 7,-1, 1/7, -1/49 please explain

Answer»

Answer: 49 /8

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Step-by-step EXPLANATION:

Common ratio ( R) = t 2 /t 1= -1/7

For INFINTE geometric SEQUENCE,

S∞ = t 1 / (1 - r)

= 7 / (1 + 1/7)

= 7 / (8 /7)

= 7 *7 /8

= 49/ 8

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