1.

yields 1 as remainder.Find the 20th term from the last term of the A.P. 3, 8, 13,.., 253

Answer»

We have, l = Last term = 253

and,

d = Common difference = 8 - 3 = 5

∴ 20th term from the end = l - (20 - 1)d

= l - 19d

= 253 - 19 × 5

= 253 - 95 = 158



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