Question

The reciprocal of 2-√2 is equal to.
a. 2+√2
b. √2 -2
c. 1/ (2-√2)
d. 1/ (2+√2)​

Answer 1

Reciprocal of 2-√2

=$\frac{1}{2 - 2 \sqrt{2} }$

Now, 1/2-2√2 = 2+2√2

We will get it by rationalising the denominator .