Para resolver a desigualdade , vamos começar por simplificar as expressões envolvidas.
Vamos começar por simplificar a expressão . Para fazer isso, podemos multiplicar o numerador e o denominador por para evitar a presença de um termo negativo no denominador. Isso nos dá:
Agora, vamos simplificar a expressão . Para fazer isso, podemos multiplicar o numerador e o denominador por para evitar a presença de um termo negativo no denominador. Isso nos dá:
Agora, podemos substituir essas expressões simplificadas na desigualdade original:
Vamos resolver essa desigualdade.
Solve the inequality by following steps:
step0: Solve the inequality by testing the values in the interval:
step1: Find the domain:
step2: Rewrite the fraction:
step3: Move the expression to the left side:
step4: Subtract the terms:
step5: Change the sign:
step6: Set the numerator and denominator of equal to 0
step7: Calculate:
step8: Determine the test intervals:
step9: Choose a value:
step10: Test the chosen value:
step11: The final solution is
step12: Check if the solution is in the defined range:
step13: Find the intersection:
A solução da desigualdade é .
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The Deep Dive
To solve the inequality , we first need to set a common ground by getting all terms on one side. We can rearrange it like this:
To combine the fractions, find a common denominator:
Now, simplifying the numerator:
So the full numerator becomes:
Now the inequality looks like this:
Next, we need to analyze when this entire rational expression is less than zero. The denominator will change signs based on the zeros:
leads to
leads to
For the numerator, does not have real roots (the discriminant is negative), and since the leading coefficient is positive, it is always positive.
We can now consider the sign of the expression in intervals determined by the points and .
Intervals to test:
Testing values in each interval:
For : Positive numerator, positive denominator, result is positive.
For : Positive numerator, positive denominator, result is positive.
For : Positive numerator, negative denominator, result is negative.
So we find that the expression is only negative in the interval .
However, since we originally had an inequality , the solution to the inequality is:
Do not forget that at and , the original fractions become undefined or zero, so they are excluded from the solution. Thus the final answer is: