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Mathematics
Problem
For a positive real number
b
b
b
, which of the following statements is always true? a)
(
b
2
)
1
2
=
b
2
(b^{2})^{\frac{1}{2}}=b^{2}
(
b
2
)
2
1
=
b
2
b)
(
b
1
2
)
2
=
b
(b^{\frac{1}{2}})^2=b
(
b
2
1
)
2
=
b
c)
b
−
1
2
=
−
b
1
2
b^{-\frac{1}{2}}=-b^{\frac{1}{2}}
b
−
2
1
=
−
b
2
1
d)
b
1
2
+
b
1
2
=
b
b^{\frac{1}{2}}+b^{\frac{1}{2}}=b
b
2
1
+
b
2
1
=
b
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