Question

please answer this question​

Answer 1

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Let d be the common difference

series is a,7,b,23,c

therefore

7-a= b-7=23-b=c-23

we can write

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

a + 2d =b

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

equation (2)-(1)

_ a+3d = 23

a+d = 7

2d = 16

d=8

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

series is -1,7,15,23,31

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