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Find the 87th term of the arithmetic sequence-19,-13,-7
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Find the 87th term of the arithmetic sequence-19,-13,-7

User IRaS
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1 Answer

5 votes

Answer:

a₈₇ = 497

Explanation:

The nth term of an arithmetic sequence is


a_(n) = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 19 and d = a₂ - a₁ = - 13 - (- 19) = - 13 + 19 = 6 , then

a₈₇ = - 19 + (86 × 6) = - 19 + 516 = 497

User Abinop
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