Question

pls answer this question guys​

Answer 1

Answer:

A,7,b,23,c are in AP

let the common difference = d

b-7 = d----(1)

23-b = d---(2)

add (1) and (2)

16 = 2d

2d = 16

∴d=16/2= 8

i) d= 7-a

8=7-a⇒8-7 =-a

1= -a

∴a= -1

ii) b-7=d

b-7=8

b=8+7

b=15

iii)c-23=d

c-23=8

c=8+23

c=31

∴a =-1, b=15, c=31

Step-by-step explanation:

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Answer 2

Answer:

b=12 with common difference of 4

Step-by-step explanation:

8,b,16

a=8

d=b-8 --------------II

s3 = a+(n-1)*d    [please refer your ncert]

16=8+2*(b-8)

8=2b-16

2b=24

b=12