Question

the third and seventh terms of an ap are 17 and 27 respectively then the first term of an ap is ​

Answer 1

Answer:

ans :12

Step-by-step explanation:

17= a +2d. (1)

27= a +6d. (2)

(2)-(i)

-10=--4d

d: 10/4 = 5/2

17=a+2d

17=a+5

a=12

Answer 2

Answer:

here's your answer ..............