Question

14. A sum of `1000 is deposited every year at 8% simple interest. Calculate the interest
at the end of each year. Do these interest amounts form an A.P.? If so, find the total
interest at the end of 30 years

Answer 1

General term or nth term of A.P
The general term or nth term of A.P is given by an or tn = a + (n – 1)d, where a = a1 is the first term, d is the common difference and n is the number of term.
Sum of n terms of an AP
The sum of first n terms of an AP with first term 'a' and common difference 'd' is given by
Sn = n /2 [ 2a + ( n - 1) d] or
Sn=n /2 [ a + l ] (l = last term)

SOLUTION IS IN THE ATTACHMENT

HOPE THIS WILL HELP YOU…

Answer 2

General term or nth term of A.P

The general term or nth term of A.P is given by an or tn = a + (n – 1)d, where a = a1 is the first term, d is the common difference and n is the number of term.

Sum of n terms of an AP

The sum of first n terms of an AP with first term 'a' and common difference 'd' is given by

Sn = n /2 [ 2a + ( n - 1) d] or

Sn=n /2 [ a + l ] (l = last term)

SOLUTION IS IN THE ATTACHMENT

HOPE THIS WILL HELP YOU…