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28th term of -242, -251, -260

asked Aug 28, 2019 71.4k views

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Denis Tulskiy · Answer 1 · 2019-09-03T09:07:20+0000

Answer:

-485

Explanation:

Formula

Givens

an = a28

n = 28

a1 = - 242

Solution

d = a3 - a2

d = -260 - - 251

d = -260 + 251

d = - 9

an = a1 + (n-1)d

an = -242 + (n - 1)(-9)

a28 = - 242 + 27*(-9)

a28 = - 242 - 243

a28 = - 485

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