alleryFor GP with first term 2 and common ratio 1/2, sum to infinity:
A1
B2
C3
D4 (= 2/(1 - 1/2) = 4)
Answer & Solution
Correct answer: D. 4 (= 2/(1 - 1/2) = 4)
|r| < 1, so converges.
We have S_∞ = a/(1-r).
That is S_∞ = 2/(1 - 0.5).
That is S_∞ = 2/0.5.
So S_∞ = 4.
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