Question
If x & y are real numbers and 
then ' y ' cannot take the value(s) :
- -1
- 0
- 1
- 2
The correct answer is: -1
For that find y and where its value lies.
Complete step by step solution:
Here, we have to find the ‘y’ cannot take which value.
Firstly, x and y are real numbers,
= x
so,
y = x2
x2 never be negative for any real value,
then we can say that y is always non-negative.
y ≥ 0,
from options, -1 is negative, then y cannot take this value.
Therefore, the correct answer is -1.
Here we have, x and y are real number and = x, we have to find that what ‘y’ cannot take the value. For that find y and where its value lies.
In this question, we have to which value y cannot give. Here ‘y’ is always non-negative, so it never given the negative value.
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