Question

Find the 20th term from the last term
the AP : 3, 8, 13, . . ., 253.

Answer 1

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HERE IS YOUR Answer---

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

=>250/5=n-1

=>50=n-1

=>n=51

20 term from end

✒️(51-20+1)th term from beginning

Now...32 term

=>a+31d

=>3+31×5

=>☑️$\huge\underline\mathfrak\red{AnSweR=158}$☑️

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Answer 2

Answer:

158

Step-by-step explanation:

Given Series is 3,8,13....,253

Clearly, the series is in A.P

First term = a = 3

Common Difference = d = 5.

Last term = l = 253.

20th term from the last term:

⇒ l + (n - 1) * (-d)

⇒ 253 + (20 - 1) * (-5)

⇒ 253 + (19) * (-5)

⇒ 253 - 95

⇒ 158.

Thus, 20th term from the last term is 158.

Hope it helps you