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163, 160,157,... Find the 42nd term.

163, 160,157,... Find the 42nd term.
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5 votes
163, 160,157,... Find the 42nd term.

User Ahmet Recep Navruz
by
7.9k points

1 Answer

2 votes

Answer:

40

Explanation:

163, 160,157,... Find the 42nd term

a_1 = 163

common difference d = 160 - 163 = -3

use the formula : a_n = (n - 1)*d + a_1

so

a_42 = (42 - 1)*(-3) + 163

a_42 = 41*(-3) + 163

a_42 = -123 + 163 = 40

User J Cole Morrison
by
7.9k points
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