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Mathematics
Problem
The three expressions
2
x
2
,
3
x
+
1
,
5
x
−
1
2x^{2},\,3x+1,\,5x-1
2
x
2
,
3
x
+
1
,
5
x
−
1
are the first three terms of an arithmetic progression. What is the positive value of
x
x
x
? a)
1
1
1
b)
3
2
\dfrac{3}{2}
2
3
c)
3
3
3
d)
2
2
2
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