Question

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Answer 1

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Answer:

a = 3, d = 5

Now, 253 = a + (n + 1) d

⇒ 253 = 3 + (n -1) x 5

⇒ 253 = 3 + 5n – 5 = – 2

⇒ 5n = 253 + 2 = 255

⇒ n = 255/5 = 51

Therefore, 20th term from the last term = 51 – 19 = 32

a32 = a + 31d

        = 3 + 31 x 5

        = 3 + 155 = 158

Thus, required term is 158

Hope it helps u.

Answer 2

Answer:

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