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Mathematics

Answered

Fin find the 31st term in -3, -5, -7, -9

Answer :

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Answer:

-63

Find common difference:

-5 -(-3)

-5 + 3

-2

nth term:

a + (n-1)(d) [where a is first term, d is common difference]

-3 + (n-1)(-2)

-3 -2n + 2

-2n -1

So 31st term:

-2(31) -1

-63

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