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marleas
21.01.2021 •
Mathematics
Given that kx^2 + hx - 4 = 0 has no roots. Find the ranges of value of k
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Ответ:
The ranges of value of k are values larger than 0 and lower than 16.
Step-by-step explanation:
Suppose we have a second order polynomial in the following format:
It will have no roots if:
In this question, we have that:
So, the coefficients are:
Then
A quadratic function, with a positive(as is 1 in this inequality), will be negative between it's roots.
The roots are:
So
h = 0 or h = 16.
The ranes of value of k are values larger than 0 and lower than 16.
Ответ: