Question

Find the eleventh term from the last term of the AP : 27,23,19, ..., - 65.

Answer 1

a₁₁ = -25

Detailed Answer:

27, 23, 19, .........., -65

d = a₂ - a₁ = 23 -27 = -4

We are taking 11th term from the last we will take d = 4 and a₁ = -65

Now,

a₁₁ = a₁ + (11 -1)d

= -65 + 10(4)

= -65 + 40

= -25