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If A)18
B)-54
C)-13
D)-18

Question 10

Multiple Choice

If k=1ak=4 and k=1bk=9, find k=1(9ak2bk) \sum _ { k = 1 } ^ { \infty } a _ { k } = - 4 \text { and } \sum _ { k = 1 } ^ { \infty } b _ { k } = 9 \text {, find } \sum _ { k = 1 } ^ { \infty } \left( 9 a _ { k } - 2 b _ { k } \right)


A) 18
B) -54
C) -13
D) -18

Correct Answer:

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