Question

find the missing terms in the following A.P _, 13,_, 3
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Answer 1

Answer:

x=13,y=13-10=5

Step-by-step explanation:

x,13,y,3

common diff d=13-x=y-13=3-y

let ist and 2nd

13-x=y-13

x+y=26_____(1)

let ist and 3rd

13-x=3-y

x-y=10_____(2)

now eqn 1+eqn 2

2x=26

x=13,y=13-10=5

Answer 2

Answer:

a.p 18 , 13 , 8, 3

Step-by-step explanation:

A.P ,13, ,3

In an AP,

t1 = a , t2 =13, t3 =? , t4 =3

13 = a + d

3 = a + 3d

Substracting equ(1) from equ(2),

d = -5

Substitute the value of 'd = -5' in equ(1),

we get.

a = 18