Question

Find the APs in the following missing terms in the boxes : _,_,3,_,-11

Answer 1

Answer:

at least give a consecutive term :/ How Can I know The Common difference

Answer 2

a= a+(n-1)d

a3 = a + (3-1)d

3 = a + 2d

a = 3 - 2d — eqn. 1

a5 = a + (5 - 1)d

-11 = a + 4d

putting eqn. 1

-11 = 3 - 2d + 4d [a = 3 - 2d]

-11 = 3 + 2d

-11 - 3 = 2d

-14 = 2d

d = -14/2

d = -7

by using eqn.1

a = 3 - 2d

a = 3 - 2(-7)

a = 3 + 14

a = 17

a2 = a + (2 - 1)d

a2 = 17 + (2 - 1)(-7)

a2 = 17 - 7

a2 = 10

a4 = a + (n - 1)d

a4 = 17 + (4 - 1)(-7)

a4 = 17 + (3)(-7)

a4 = 17 + (-21)

a4 = 17 - 21 = -4