a8 = 0 = a1 + 7d
a18 = a1 + 17d = a1 + 7d + 10d = 10d
a38 = a1 + 37d = a1 + 7d + 30d = 30d
QED
S.j. K.
asked • 11/12/18Arithmetic progression
8th term of an A.P is 0.
Then prove that 38th term is thrice of 18th term.
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