Question

which one of the following is not a rational number
$1)\sqrt{2}$
$2)0$
$3) \sqrt{4}$
$4) - \sqrt{16}$
please tell me the answer faster



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Answer 1

Answer:

(1) sqrt 2

this uthe answer

Answer 2

Answer:

Let x = 6+6+6+....∞−−−−−−−−√−−−−−−−−−−−−√−−−−−−−−−−−−−−−−−√

so x = 6+x−−−−−√

squaring both side:

x^2 = 6 + x ;

x^2 - x - 6 = 0 ;

x^2 -3*x + 2*x - 6 = 0

(x - 3)*(x + 2) = 0

x = 3 ,- 2

x =3 is the answer.

In general,

w2−−√ = |w| :

y = |w|: