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Basic of Logarithms
medium
${{\sqrt {(5/2)} + \sqrt {(7 - 3\sqrt 5 )} } \over {\sqrt {(7/2)} + \sqrt {(16 - 5\sqrt 7 )} }}=$
A
સંમેય
B
અમૂલદ
C
$\sqrt 7 $ નો ગુણક
D
એકપણ નહીં
Solution
(a) ${{\sqrt {5/2} + \sqrt {7 – 3\sqrt 5 } } \over {\sqrt {7/2} + \sqrt {16 – 5\sqrt 7 } }} = {{\sqrt 5 + \sqrt {14 – 6\sqrt 5 } } \over {\sqrt 7 + \sqrt {32 – 10\sqrt 7 } }}$
$= {{\sqrt 5 + (3 – \sqrt {5)} } \over {\sqrt 7 + (5 – \sqrt 7 )}} = {3 \over 5}$, which is rational.
Standard 11
Mathematics