Question

a1=5,a4=9½ find a2,a3​

Answer 1

Answer:

a1 = 5

a4 = 91/2

a + 3d = 19/2

5 + 3d = 19/3

3d = 19/2 - 5

3d = 9/2

d = 3/2

so , a2 = a + d = 5 + 3/2 = 13/2 = 6 1/2

a3 = a + 2d = 5 + 2 × 3/2 = 5 + 3 = 8

Answer 2

Answer:

a2=13/2=6 1/2

a3= 8

Step-by-step explanation:

a4 = a1+3d

19/2 = 5+3d

19/2-5 = 3d

(19×1)-(5×2)/2 = 3d

(19-10)/2 = 3d

9/2 = 3d

9/(2×3) =d

9/6 = d = 3/2

a2=a1+d

= 5+3/2

= (5×2)+3/2

=10+3/2

=13/2

a3=a2 + d

= 13/2+3/2

= 16/2

= 8