# Q : 1     In which of the following situations, does the list of numbers involved make an arithmetic progression, and why?             (iv) The amount of money in the account every year, when    is deposited at  compound interest at    per annum.

Amount in the beginning = Rs. 10000

Interest at the end of 1st year at rate of
is  of 10000 =

Therefore, amount at the end of 1st year will be

= 10000 + 800

= 10800

Now,

Interest at the end of 2nd year at rate of
is   of 10800 =

Therefore,, amount at the end of 2ndyear

= 10800 + 864 = 11664

Since, each subsequent term is not obtained by adding a unique number to the previous term; hence, it is not an AP

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