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9 June, 14:18

Write the sum using summation notation, assuming the suggested pattern continues.

-9 - 4 + 1 + 6 + ... + 66

summation of negative forty five times n from n equals zero to fifteen

summation of the quantity negative nine plus five n from n equals zero to fifteen

summation of the quantity negative nine plus five n from n equals zero to infinity

summation of negative forty five times n from n equals zero to infinity

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  1. 9 June, 17:58
    0
    It's the second choice

    Step-by-step explanation:

    Note that the numbers values increase by 5.

    When n = 0, we have - 9 + 5 (0) = - 9

    when n = 1 it is - 9 + 5 (1) = - 4

    when n = 2 it is - 9 + 5 (2) = 1 and so on.

    when n = 15 (the last term) 66 = - 9 + 5 (15).

    We can write the summation as:

    n=15

    ∑ (-9 + 5n)

    n=0.
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