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  • The 5thterm and the 21stterm of a series in an A.P. are 10 and 42 respectively. Find the 31st term.Option: 1</st

The 5thterm and the 21stterm of a series in an A.P. are 10 and 42 respectively. Find the 31st term.

Option: 1

62


Option: 2

__


Option: 3

__


Option: 4

__


Answers (1)

best_answer

a+4=10-------(1)

a+20d=42------(2)

By substituting equation (1) from equation (2), a=2

31stterm = a+30d=2+30(B)=62.

Posted by

Suraj Bhandari

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