Question

if x-1,x+3,3x-1 are in AP then x is equal
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Answer 1

Answer:

4 is right answer

Step-by-step explanation:

a=x-1 ,b=x+3 , c=3x-1

by arithmetic mean,

b=(a+c)/2

x+3= (x-1)+(3x-1)

2

2 (x+3)=(x-1)+(3x-1)

2x+6= x-1+3x-1

2x+6=3x+x -1-1

2x+6=4x-2

6+2=4x-2x

8=2x

2x=8

x= 8

2

x=4

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