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26-05-2021
Mathematics

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Write an explicit formula for an, the nth term of the sequence 1, 11, 21

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cwrw238 cwrw238

26-05-2021

Answer:

an = 10n - 9.

Step-by-step explanation:

This is arithmetic with first term a1 = 1 and common difference 10.

an = a1 + d(n-1)

= 1 + 10(n - 1)

= 1 + 10n - 10

= 10n - 9.

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