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प्रश्न
The value of k for which the quadratic equation kx2 − 5x + 1 = 0 does not have a real solution, is __________.
पर्याय
0
`25/4`
`4/25`
7
MCQ
रिकाम्या जागा भरा
उत्तर
The value of k for which the quadratic equation kx2 − 5x + 1 = 0 does not have a real solution, is 7.
Explanation:
Given equation, kx2 − 5x + 1 = 0
Here, a = k, b = −5, c = 1
Since roots are not real,
So, b2 – 4ac < 0
(-5)2 – 4 × k × 1< 0
25 – 4k < 0
4k < 25
k < `25/4`
k < 6.25
The value of k is 7.
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