Question

Which term of the AP :11,8,5,2......is -151?​

Answer 1

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Q:-Which term of the AP :11,8,5,2......is -151?

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------>>>>Here is your answer<<<<--------

a=11

A2=8

D=A2-a1

D=8-11=-3

an=-151

$➜an = a + (n - 1)d$

$➜ - 151 = 11 + (n - 1) - 3$

$➜ - 151 = 11 - 3n + 3$

$➜ - 151 = 14 - 3n$

$➜ - 151 - 14 = - 3n$

$➜ - 165 = - 3n$

$➜n = \frac{ - 165}{ - 3} = 55$

∴55th term of the AP :11,8,5,2......is -151

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