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