Question

If the 8th and 22nd term of an A.P. are 12 and 52 respectively then first term of the A.P. is *​

Answer 1

Answer:

a = - 8

Step-by-step explanation:

8th term = a + ( 8-1 ) d

12 = a + 7d _____ ( 1 )

similarly,. 52 = a+21d ______( 2 )

solving ( 1 ) and (2),

- 40 = - 14 d

d = 20/7

put d in ( 1 ) ,

a= 12 - 7×20/7

a = -8

Answer 2

Answer:

Please find the attachment