Q79 of 90 Page 133

Divya deposited Rs 1000 at compound interest at the rate of 10% per annum. The amounts at the end of the first year, second year, and third year form an AP. Justify your answer?

P = 1000


R = 10% per annum


1st year compound interest,




For 2nd year compound interest,




For 3rd year compound interest,




For 1st year, 2nd year and 3rd year


1100, 1210 and 1331


If any sequence are in A.P. then common difference between any two consecutive term is constant


So, 1210 – 1100 = 110


1331 – 1210 = 121


So it is not constant so it is not in A.P.


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