Question

.
4, X- 1,8 are in arithmetic progression,
than the value of x is​

Answer 1

Step-by-step explanation:

2x,x+8,3x+1 are in A.P.

Thus,

(x+8)−2x=(3x+1)−(x+8)

8−x=2x−7

3x=15

x=5

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Answer 2

Answer:

arithmetic progression,b^2=ac

Step-by-step explanation:

so,(x-1)^2=32

therefore, x^2-2x-31=0

x=+42^1/2+1