Question

find the 23rd term from the last of AP 3 8 13 dotdotdot 253​

Answer 1

Answer:

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Step-by-step explanation:

a=3

d=5

from last..

A= 253

D= -5

A23=a+22d

=253+22 (-5)

=253+(-110)

=253-110

=143

so A23=143

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Answer 2

d=13-8=5

a=3

an=253=3+(n-1)5

250÷5=n-1

n=51

let a=253

a23=253plus 22*-5

=143

thus 23rd term of ap from the last is 143