Math, asked by naseema48, 1 year ago

which term of AP is 20,21,18.......78

Answers

Answered by kumvis25

$a = 20 \: a2 = 21 \: a3 = 18 \\ now \\ d = a2 - a1 = 21 - 20 = 1 \\ also \\ d = a3 - a2 = 18 - 21 = - 3 \\ so \: there \: is \: no \: common \: difference \: \\ hence \: it \: is \: not \: an \: ap$

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