Question

common difference is -2 , nth term is 22, an is -39 find the first term​

Answer 1

Step-by-step explanation:

given d=-2, nth term =22.an =-39

by using formula of a +(n-1 )d

an=a+(n-1)d

-39=a+(22-1)-2.

-39=a-42.

-39+42=a.

3=a.

a=3.

so first term =3.

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