Question

find a,b,c such that the following no. are in a,7,b,23,c.....​

Answer 1

Answer:

a= -1,b=15,c=31

Step-by-step explanation:

7is second term

:. a+d=7........(1)

23 is fourth term

:. a+3d=23....(2)

(2)-(1)

a +3d = 23

-a - d. = -7

=

Answer 2

Answer:

23-b=b-7

2b =30

b =15

then

7-a= b-7

7-a=15-7

7-a=8

a=1