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(c) [tex]\log_9 \frac{1}{25} = -\log_9 5[/tex]

Answer :

To solve the problem [tex]\(\log _9 \frac{1}{25} = \text{Ø} \log _9 5\)[/tex], let's analyze each side of the equation and see if they are equal.

1. Calculate [tex]\(\log_9 \frac{1}{25}\)[/tex]:

Using the properties of logarithms, we can rewrite [tex]\(\log_9 \frac{1}{25}\)[/tex] as:
[tex]\[
\log_9 \frac{1}{25} = \log_9 1 - \log_9 25
\][/tex]

Based on the logarithmic identity, [tex]\(\log_b 1 = 0\)[/tex] for any base [tex]\(b\)[/tex], and knowing that:
[tex]\[
\log_9 25 \approx 2 \times \log_9 5
\][/tex]
We simplify the expression:
[tex]\[
\log_9 \frac{1}{25} = 0 - 2 \times \log_9 5 = -2 \times \log_9 5
\][/tex]

Numerically, this value is approximately [tex]\(-1.46497\)[/tex].

2. Evaluate [tex]\(\log_9 5\)[/tex]:

Now, let's consider the term [tex]\(\log_9 5\)[/tex]. The value of [tex]\(\log_9 5\)[/tex] can be computed, but for the purpose here, it is given to be approximately [tex]\(0.73249\)[/tex].

3. Comparison:

We have:
[tex]\[
\log_9 \frac{1}{25} \approx -1.46497
\][/tex]
[tex]\[
2 \times \log_9 5 \approx 1.46497
\][/tex]

We see that [tex]\(\log_9 \frac{1}{25}\)[/tex] does not equal [tex]\(\log_9 5\)[/tex], reaffirming that [tex]\(-2 \times \log_9 5\)[/tex] and [tex]\(\log_9 5\)[/tex] are not equal.

Thus, the initial statement [tex]\(\log _9 \frac{1}{25} = \text{Ø} \log _9 5\)[/tex] is false. The steps reveal that the correct relationship involves a factor of [tex]\(-2\)[/tex] instead, not simply Ø (which implies equality).

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