Question

The 11th term and the 21st term in this AP which term number is-151



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Answer 1

Answer:

55th term

Step-by-step explanation:

The Arithmetic sequence is given by

11, 8, 5, 2

The first term, a = 11

common difference, d = 8-11 = -3 The general term of AP is given by

an = a + (n − 1)d

Here,

a = 11, d= -3, nth term = -151, n = ?

Substituting these values in the formula and solve for n

-151: = 11 + (n − 1)(-3)

-15111 - 3n+3

3n = 11+3+151

3n = 165

n = = 55

Therefore, the 55th term is -151.