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If the n^th term of the AP is 8n + 1, then the 20^th term will be ______

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If the n^th  term of the AP is 8n + 1, then the 20^th term will be ______

(a) 160

(b) 120

(c) 161

(d) 121

This question was posed to me in my homework.

The doubt is from Nth Term of Arithmetic Progression topic in chapter Arithmetic Progressions of Mathematics – Class 10

1 Answer

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Best answer
The correct answer is (c) 161

Best explanation: n^th  term of the AP is 8n + 1

Tn = 8n + 1

T20 = 8(20) + 1

T20 = 161

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