Question
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Ask by George Stanley. in Russia
Mar 30,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

Решение неравенства даёт множество всех действительных чисел , удовлетворяющих условию .

Solution

  1. Приведём знаменатель к квадрату:
    Заметим, что для всех и равно нулю только при . В точке выражение не определено, поэтому .
  2. Исходное неравенство имеет вид
    Так как знаменатель положителен для всех , знак неравенства определяется знаком числителя. Таким образом, необходимо решить
  3. Перепишем неравенство:
  4. Заменим на степень с основанием 5:
    таким образом неравенство становится
  5. Представим как степень пятёрки:
    поэтому
  6. При неравенстве с одинаковым основанием ( ) можно сравнить показатели степени:
    Отсюда
  7. Поскольку не входит в область определения, а , этот случай не затрагивает найденное решение.
Итоговое решение:

Answered by UpStudy AI and reviewed by a Professional Tutor

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Simplify this solution

Mind Expander

To solve the inequality , we first need to determine when the numerator and denominator change signs.
The numerator is . Since is a positive quantity that decreases as increases, the numerator is zero when . Solving this gives .
The denominator, , is a quadratic. To analyze its sign, we can calculate its discriminant: , indicating a double root. Its solution, given by , tells us that the quadratic does not cross the x-axis, and since the leading coefficient (4) is positive, it’s always positive for all .
Thus, the critical points to consider are from the denominator (where the function is undefined) and where the numerator equals zero. We can then analyze the intervals determined by these points to find where the entire expression is less than or equal to zero.
Be sure to use test points to confirm the sign of the expression in each interval you evaluate.

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