Question

if the 9 term of anAp is zero prove that 29term is twice is 190 term
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Answer 1

Answer:

a9=a+8d

a9=0

0=a+8d

-8d=a

a29=a+28d

a29=20d

a19=a+18d

a19=-8d+18d

a19=10d

Hence 2(a19)=a29