The problem asks to find the value of the expression $((log_2 9)^2)^{\frac{1}{log_2(log_2 9)}} \times (\sqrt{7})^{\frac{1}{log_4 7}}$.

AlgebraLogarithmsExponentiationAlgebraic Manipulation
2025/4/22

1. Problem Description

The problem asks to find the value of the expression ((log29)2)1log2(log29)×(7)1log47((log_2 9)^2)^{\frac{1}{log_2(log_2 9)}} \times (\sqrt{7})^{\frac{1}{log_4 7}}.

2. Solution Steps

Let's analyze the first term.
((log29)2)1log2(log29)((log_2 9)^2)^{\frac{1}{log_2(log_2 9)}}
We can rewrite this as:
(log29)2log2(log29)(log_2 9)^{\frac{2}{log_2(log_2 9)}}
Using the property alogax=xa^{log_a x} = x, we want to manipulate the exponent. We can rewrite the exponent as:
2log2(log29)=21log2(log29)=2loglog292=loglog2922=loglog294\frac{2}{log_2(log_2 9)} = 2 * \frac{1}{log_2(log_2 9)} = 2 * log_{log_2 9} 2 = log_{log_2 9} 2^2 = log_{log_2 9} 4
Thus, the first term is (log29)loglog294=4(log_2 9)^{log_{log_2 9} 4} = 4.
Now, let's analyze the second term:
(7)1log47(\sqrt{7})^{\frac{1}{log_4 7}}
We can rewrite this as:
(71/2)1log47=7121log47=712log74=7log741/2=7log72=2(7^{1/2})^{\frac{1}{log_4 7}} = 7^{\frac{1}{2} * \frac{1}{log_4 7}} = 7^{\frac{1}{2} * log_7 4} = 7^{log_7 4^{1/2}} = 7^{log_7 2} = 2.
So, the expression is 4×2=84 \times 2 = 8.

3. Final Answer

8

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