Which of the following relation is/are true?
$$\eqalign{
& {\text{I}}.{\left( {27} \right)^{\frac{1}{3}}} > {\left( {13} \right)^{\frac{1}{2}}} < {\left( {47} \right)^{\frac{1}{6}}} \cr
& {\text{II}}.{\left( {23} \right)^{\frac{1}{3}}} < {\left( {49} \right)^{\frac{1}{2}}} < {\left( {52} \right)^{\frac{1}{6}}} \cr
& {\text{III}}.{\left( {53} \right)^{\frac{1}{6}}} < {\left( {41} \right)^{\frac{1}{3}}} < {\left( {37} \right)^{\frac{1}{2}}} \cr} $$
A. Only III
B. Both I and II
C. II and III only
D. All relations are false
Answer: Option A
Solution (By Examveda Team)
$$\eqalign{ & {\text{Take LCM of }}\left( {2,\,3\,\& \,6} \right) = 6 \cr & {\text{I}}.{\left( {27} \right)^{\frac{1}{3}}} > {\left( {13} \right)^{\frac{1}{2}}} < {\left( {47} \right)^{\frac{1}{6}}} \cr & = {\left( {27} \right)^{\frac{2}{{3 \times 2}}}} > {\left( {13} \right)^{\frac{3}{{2 \times 3}}}} < {\left( {47} \right)^{\frac{{1 \times 1}}{{6 \times 1}}}} \cr & = {\left( {27} \right)^{\frac{2}{6}}} > {\left( {13} \right)^{\frac{3}{6}}} < {\left( {47} \right)^{\frac{1}{6}}} \cr & = {\left( {729} \right)^{\frac{1}{6}}} > {\left( {2197} \right)^{\frac{1}{6}}} < {\left( {47} \right)^{\frac{1}{6}}} \cr & {\text{This statement is false}} \cr & {\text{II}}.{\left( {23} \right)^{\frac{1}{3}}} < {\left( {49} \right)^{\frac{1}{2}}} < {\left( {52} \right)^{\frac{1}{6}}} \cr & = {\left( {23} \right)^{\frac{2}{{3 \times 2}}}} < {\left( {49} \right)^{\frac{3}{{2 \times 3}}}} < {\left( {52} \right)^{\frac{{1 \times 1}}{{6 \times 1}}}} \cr & = {\left( {529} \right)^{\frac{1}{6}}} < {\left( {117649} \right)^{\frac{1}{6}}} < {\left( {52} \right)^{\frac{1}{6}}} \cr & {\text{This statement is false}} \cr & {\text{III}}.{\left( {53} \right)^{\frac{1}{6}}} < {\left( {41} \right)^{\frac{1}{3}}} < {\left( {37} \right)^{\frac{1}{2}}} \cr & = {\left( {53} \right)^{\frac{1}{{6 \times 1}}}} < {\left( {41} \right)^{\frac{2}{{3 \times 2}}}} < {\left( {37} \right)^{\frac{3}{{2 \times 3}}}} \cr & = {\left( {53} \right)^{\frac{1}{6}}} < {\left( {1681} \right)^{\frac{1}{6}}} < {\left( {50653} \right)^{\frac{1}{6}}} \cr & {\text{This statement is true}} \cr} $$Related Questions on Surds and Indices
A. $$\frac{1}{2}$$
B. 1
C. 2
D. $$\frac{7}{2}$$
Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:
A. 1.45
B. 1.88
C. 2.9
D. 3.7
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