Question

a3×a7=8, a+4d=3 plzz solve it fastly​

Answer 1

Solution==>>

From , a+4d=3

a=3-4d

now substitute the value of a in a3×a7=8

(a+2d)(a+6d)=8

(3-4d+2d)(3-4d+6d)=8

(3-2d)(3-2d)=8

9-4d²=8

-4d²=8-9

-4d²=-1

d²=1/4

d=√1/4

d=1/2

now put d in a=3-4d

a=3-4(1/2)

a=3-2(1)

a=3-2

a=1

•.• value of a=1 and d=1/2

ANSWER....