The fourth term of an AP is 0.prove that its 25th term is triple its 11th term
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a + 3d = 0 (given)
To prove : a + 24d = 3 (a+10d)
Proof : a + 24d = 3a + 30d
2a+6d = 0
2(a+3d) = 0
2 (0) = 0
L.H.S = R.H.S.
(Hence proved)
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