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