For a positive real number

MATHEMATICS · Single correct · CBSE · Mathematics · Number Systems · Number Systems

Problem

b

, which of the following statements is always true? (a)

(b^{2})^{\frac{1}{2}}=b^{2}

(b)

(b^{\frac{1}{2}})^2=b

(c)

b^{-\frac{1}{2}}=-b^{\frac{1}{2}}

(d)

b^{\frac{1}{2}}+b^{\frac{1}{2}}=b