Question

In an A.P the 3rd term is x+7 and 7th term is x+49 , what is the 1st term ?

Answer 1

$\bf\large\underline\pink{Answer:-}$

Answer 2

Answer a3 that is a + 2d

A7 that is a +6d

By solving we get

3a + 6d =3 (x+7) ( multiply by 3)

a + 6d=x + 49

Solving it we get 2a = 4x +70

By dividing we get

a=2x + 70

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