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3 September, 03:22

The first term of an arithmetic sequence is - 22. The common difference of the sequence is 5.

What is the sum of the first 30 terms of the sequence?

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  1. 3 September, 07:05
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    Answer: the sum of the first 30 terms of the sequence is 1515

    Step-by-step explanation:

    The formula for determining the sum of n terms of an arithmetic sequence is expressed as

    Sn = n/2[2a + (n - 1) d]

    Where

    n represents the number of terms in the arithmetic sequence.

    d represents the common difference of the terms in the arithmetic sequence.

    a represents the first term of the arithmetic sequence.

    From the information given,

    n = 30

    a = - 22

    d = 5

    Therefore, the sum of the first 30 terms, S30 would be

    S30 = 30/2[2 * - 22 + (30 - 1) 5]

    S30 = 15[ - 44 + 145)

    S30 = 15 * 101 = 1515
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