Question

solve this section please​

Answer 1

Answer:

Step-by-step explanation:

7/2(2a+6d)=10

7/2(2(t8)+6d)=17  Next seven terms start with another set of same ap but instead of first term it is 8th term.

7/2(2(a+7d)+6d)=17

7/2(2a+14d+6d)=17

7/2(2a+20d)=17

7a+70d=17

7a+21d=10

49d=7

d=1/7

7a+21/7=10

7a+3=10

7a=10-3

7a=7

a=7/7=1

Ans—  Ap is 1,8/7,9/7,10/7,11/7 and so on...

verification :

s7=10

7+8+9+10+11+12+13=70

70/7=10=rhs (verified)