16 Апр 2019 в 19:41
166 +1
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Ответы
1

To solve this inequality, we first need to find the roots of the quadratic expression in the numerator.

The roots can be found by setting the numerator equal to 0:

7x^2 + 6x - 1 = 0

Using the quadratic formula, we find that the roots are x = 1/7 and x = -1.

Next, we need to determine the sign of the expression for different ranges of x.

For x < -1, the expression 7x^2 + 6x - 1 is negative and 5-x is also negative. The fraction of two negative values will be positive.

For -1 < x < 1/7, the expression 7x^2 + 6x - 1 is positive and 5-x is negative. The fraction of a positive and a negative value will be negative.

For x > 1/7, both 7x^2 + 6x - 1 and 5-x are positive. The fraction of two positive values will be positive.

Therefore, the solution to the inequality is x < -1 or x > 1/7.

28 Мая 2024 в 18:19
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