Question

2. Decide whether following sequence is an A.P., if so find the 20th term of the progression. -12, -5, 2, 9, 16, 23, 30,...​

Answer 1

Answer:

Step-by-step explanation:

Here the sequence is in AP because in the sequence common difference, d = 7.

We know that in AP an = a + (n-1) d

Therefore the 20 th term of the progression is -12 + (20 - 1) 7 = -12 + 133 = 121 (ans)