Question

_13_3
Find the missing term

Answer 1

18 13 8 3

common difference is 5

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Answer 2

Step-by-step explanation:

a2 = 13

a4 = 3

we have to find a1 and a3

so

a2 = 13

a+ d =13...(1)

a4 = 3

a + 3d = 3 (2)

by eleminating eq 1 and 2 we get

a = 18

and

d = -5

now

a1 = a + d

-5+18 = 13

and a3 = a + 2d

18 + 2×-5

18 + (-10)

so

a3 = 8