Evaluate: Σ21(2n + 8) = [?] HELP ME PLS

Question

Evaluate:
Σ21(2n + 8) = [?]
HELP ME PLS

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RobertKer 3 years 2021-09-03T21:51:45+00:00 1 Answers 6 views 0

Answers ( )

  1. kiet
    0
    2021-09-03T21:52:47+00:00
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    Answer:

    42n+108

    Step-by-step explanation:

    21(2n+8)

    42n+108

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )