Question

The 8th term of an ap is 0 prove that its 38th termis triple its 18th term

Answer 1

this will help you in solving your problem

Answer 2

a8= 0

a38 = 3(a18)

a8= a+7d=0

=> a= -7d

=> a38= a+37d

a18= a+17d

a+37d = 3(a +17d)

-7d + 37d =3(-7d+17d)

=>30d= 3(10d)

=>30d=30d

= 0

HENCE PROVED!!!!!

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