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Pls help! WIth sequence order

Pls help! WIth sequence order-example-1
User Tspauld
by
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2 Answers

5 votes

Answer:

The answer is -1210.

Step-by-step explanation

The common difference in this sequence, -25 - -10= -15

To find the nth term, an= a1+ (n-1)d

Therefore, a81 = -10 + (81-1)(-15) = -1210

Hope this helps

User Pescuma
by
8.6k points
3 votes

Answer:

a₈₁ = -1210

Explanation:

seq: -10, -25, -40, ...

a = -10 (first term)

d = -25 - (-10) = -15 (difference)

aₙ = a + (n-1)d

a₈₁ = -10 + (81-1)(-15)

= -10 + 80(-15)

= -10 - 1200

a₈₁ = -1210

User Flobacca
by
8.2k points

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