JEE MainMathematicsQuadratic Equation and InequalitiesMCQ+4 / −1
The number of real solutions of the equation , is
- A3
- B4
- C0
- D2
View written solutionFree
Correct answer: C
- Given equation
We need the number of real solutions.
Also note that because of the terms and .
- Substitute a standard expression
Let
Then,
Substitute into the equation:
- Solve for
Factorizing:
So,
That is,
- Check which values of are possible for real
For real ,
So the expression cannot take any value strictly between and .
But both values obtained are:
Both lie in the interval , so neither is possible for real .
Hence there are no real solutions.
- Conclusion
The number of real solutions is
So the correct option is C.
- Comparison with stored answer
Stored correct answer: C
Our derived answer: C
They agree.
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