Question

which term of the AP 5,8,11,24,.... is 320​

Answer 1

Answer:

Clearly, 5 + 3 = 8, 8 + 3 = 11, 11 + 3 = 14, .....

So, the series is an A.P. in which a - 5 and d = 3.

Let 320 be the nth term of the series.

Then, 320 = 5 + (n - 1) x 3 or (n - 1) = 105 or n = 106.

Answer 2

Step-by-step explanation:

let, An = 320

a + (n-1)d = 320

5 + (n-1)×3 = 320

5 + 3n - 3 = 320

3n +2 = 320

3n = 318

n = 106

hence 106th term of the AP is equal to 320