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Mathematics
Mathematics
Problem
Evaluate
1
7
−
5
+
1
7
+
5
\dfrac{1}{\sqrt{7}-\sqrt{5}}+\dfrac{1}{\sqrt{7}+\sqrt{5}}
7
−
5
1
+
7
+
5
1
. a)
2
7
2\sqrt{7}
2
7
b)
5
\sqrt{5}
5
c)
7
\sqrt{7}
7
d)
1
7
\dfrac{1}{\sqrt{7}}
7
1
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