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alekssr [168]
3 years ago
14

What is the exact value of x?

Mathematics
1 answer:
boyakko [2]3 years ago
5 0

Answer:

B

Step-by-step explanation:

5\cdot 21^{5x} = 16 \\\ 21^{5x} = \frac{16}{5} \\\\ 21^{5x} = 3.2 \\\ log 21^{5x} = log 3.2 \\\ 5x\cdot log 21 = log 3.2 \\\ 5x = \frac{log 3.2}{log 21} \\\\\ x = \frac{log 3.2}{5\cdot log 21}


I hope I helped you.

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