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25 Sep 2024, 01:30
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A
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Difficulty:
5%
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Question Stats:
89% (01:23) correct
11%
(02:10)
wrong
based on 216
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History
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\(\sqrt{\frac{7}{5}} - \sqrt{\frac{5}{7}} = \)
(A) \(\frac{2}{\sqrt{35}}\)
(B) \(\sqrt{25}\)
(C) \(\frac{5}{\sqrt{35}}\)
(D) \(\frac{7}{\sqrt{35}}\)
(E) \(\sqrt{35}\)
(A) \(\frac{2}{\sqrt{35}}\)
(B) \(\sqrt{25}\)
(C) \(\frac{5}{\sqrt{35}}\)
(D) \(\frac{7}{\sqrt{35}}\)
(E) \(\sqrt{35}\)
25 Sep 2024, 04:59
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\(\sqrt{\frac{7}{5}}-\sqrt{\frac{5}{7}}=\frac{\sqrt{7}}{\sqrt{5}}- \frac{\sqrt{5}}{\sqrt{7}}= \frac{\sqrt{7}*\sqrt{7}-\sqrt{5}*\sqrt{5}}{\sqrt{35}}=\frac{7-5}{\sqrt{35}}=\frac{2}{\sqrt{35}}\)
Answer: A
Answer: A
General Discussion
25 Sep 2024, 02:57
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\(\sqrt{\frac{7}{5}} - \sqrt{\frac{5}{7}} = x\)
\(x^2 = \frac{7}{5} - 2\sqrt{1} + \frac{5}{7}\)
\(x^2 = \frac{74}{35} - 2\)
\(x^2 = \frac{4}{35}\)
\(x = \frac{2}{\sqrt{35}}\)
Answer A.
\(x^2 = \frac{7}{5} - 2\sqrt{1} + \frac{5}{7}\)
\(x^2 = \frac{74}{35} - 2\)
\(x^2 = \frac{4}{35}\)
\(x = \frac{2}{\sqrt{35}}\)
Answer A.
