Question

(1 + √2) + (1 - √2) is

a) a rational number
b) a non terminating decimal
c) none of these
d) a irrational number

answer with step by step solution please​

Answer 1

Tip : Open the brackets carefully keeping the signs in mind and perform the calculation.

Solution :

After opening the brackets we get,

$1 + \sqrt{2} + 1 - \sqrt{2}$

Therefore, our answer is 2.

2 can also be written as 2/1 , which satisfies the definition of a rational number( a number that can be represented as the form p/q of two integers ,such that q ≠ 0 is a rational number ) .

Answer : A