Question

aditi saved rs. 500 in the first month of a year and then increased her monthly savings by rps 50.if in the nth term month her saving become rs 1000.find n​

Answer 1

Answer:

Given :

The series is in A. P.

So, A.P. Is=500,550,600,650......

a=500

d=50

And an=1000

What to find =n?

∴ an=a+(n-1)

=500 + (n-1) 50

=500 + (n-1)50 = 1000

=(n-1)50 = 1000-500= 500

=n-1 = 500/50 = 10

=n=11

∴ 11th term of the series

= a11=1000 in this A.P.

*extra:

1. A. P. = Arithmetic progression
2. a=The first term of the series
3. d=The common difference (like : 20,25,30,35; here the common difference is 5)
4. n= number of terms