Question

22 nd term of AP : 7 + 4 + 1 + ….. is - 56. Is it true?

Answer 1

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Answer:

Yes

Step-by-step explanation:

a = 7 , d = 4 - 7 = -3

$=>a_{22}=a+21d=7+21(-3)\\\\=>a_{22}=7-63\\\\=>a_{22}=-56$

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Answer 2

Answer:

Here

A=7

N=22

D=-3

Formula for A.P. = A+(N-1)D

=7+(22-1)-3

=7+(21*-3)

=7-63

=-56

So, it is correct. Hope it will help you.

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