Question

If the 12th term of an ap is 23 and the sum of first 22term is 484,find the 7th term

Answer 1

Answer:

solve it by

Step-by-step explanation:

1. Tn formula for 12th term

2.Sn formula for 22term

3. make eq^n and solve it

Answer 2

Step-by-step explanation:

a12 = 23

a + 11d = 23 I)

s22 = 484

a + 21d = 4. ll)

from l) and ll)

d = - 19/10

&

a = 439/10

now,

a7 = a + 6d

put values of a and d

a7 = 65/2