SOLUTION: 6 ∑ (-1)^n *5n n=3 Hard to type this question. The 6 is above and the n=3 below the sigma

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Question 738573: 6
∑ (-1)^n *5n
n=3
Hard to type this question. The 6 is above and the n=3 below the sigma
Answer by MathLover1(20850) About Me  (Show Source):