Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Explain briefly why multiplying
1
11
\dfrac{1}{\sqrt{11}}
11
1
by
11
11
\dfrac{\sqrt{11}}{\sqrt{11}}
11
11
results in a fraction with a rational denominator.
Browse the problem library