24 Июн 2021 в 19:49
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To solve this inequality, we need to find the values of x that make the expression greater than zero.

First, let's simplify the expression:
logx/3(3x^2 - 2x + 1)

Since the logarithm is a function that is only defined for positive values, we can first look at the denominator x/3 and see that x must be greater than 0. Therefore, the domain of the function is x > 0.

Now, let's factor the quadratic expression inside the logarithm:
3x^2 - 2x + 1 = (3x - 1)(x - 1)

Our expression now becomes:
logx/3((3x - 1)(x - 1))

Next, let's find the critical points by setting the expression inside the logarithm equal to 0 and solving for x:
(3x - 1)(x - 1) = 0
3x - 1 = 0
x = 1/3
x - 1 = 0
x = 1

The critical points are x = 1/3 and x = 1.

Now, we can determine the intervals where the expression is greater than zero by testing values in each interval. The intervals are (0, 1/3), (1/3, 1) and (1, ∞).

For x in the interval (0, 1/3), the expression will be negative as both factors are negative.

For x in the interval (1/3, 1), the expression will be positive as (3x - 1) is positive and (x - 1) is negative.

For x in the interval (1, ∞), the expression will be positive, as both factors are positive.

Therefore, the solution to the inequality logx/3(3x^2 - 2x + 1) > 0 is x ∈ (1/3, 1) ∪ (1, ∞).

17 Апр 2024 в 15:45
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