Fina the 5th term о! the AP 2, 7, 12…dmu-21. 18. 15.Whish term of a

1.	Fina the 5th term о! the AP 2, 7, 12…dmu-21. 18. 15.Whish term of an arithmetic progression 21, 18, 1.'s-81.
Answer» For given AP 21, 18, 15........First term a = 21, common difference d = 18 - 21 = - 3 We know,nth term of an APan = a + (n-1)d Let mth term of an AP be - 81Then,-81 = 21 + (m-1)*(-3)-81 = 21 - 3m + 33m = 81 - 243m = 57m = 57/3 = 19 Therefore 19th term of an AP is - 81

Fina the 5th term о! the AP 2, 7, 12…dmu-21. 18. 15.Whish term of an arithmetic progression 21, 18, 1.'s-81.

Answer»

For given AP 21, 18, 15........First term a = 21, common difference d = 18 - 21 = - 3

We know,nth term of an APan = a + (n-1)d

Let mth term of an AP be - 81Then,-81 = 21 + (m-1)*(-3)-81 = 21 - 3m + 33m = 81 - 243m = 57m = 57/3 = 19

Therefore 19th term of an AP is - 81