Question

Find the 15th term of A.P. whose 7th term is 82 and 11th term is 62.​

Answer 1

Step-by-step explanation:

let consider 1st term = a

common difference = d

according to question,

a +6d = 82-----------------(1)

a +10d = 62-----------------(2)

from equation 1 & 2

a = 112

d= -5

so,

15th term = a + 14d

= 112 + 14× (-5)

= 42