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If the equation x^(2)-kx+1=0 has no real...

If the equation `x^(2)-kx+1=0` has no real roots then

A

`klt-2`

B

`kgt2`

C

`-2ltklt2`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
For no real roots, we must have:` b^(2)-4aclt0.`
`k^(2)-4lt0impliesk^(2)lt4implies-2ltklt2.`
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