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miss Akunina [59]
3 years ago
10

What is 2log5(5x^3)+(1/3)log5((x^2)+6) written as a single logarithm?

Mathematics
2 answers:
joja [24]3 years ago
4 0
Assuming 5 is the base. I'm going to leave that out for now.

2log(5x^3) + (1/3)log(x^2+6)

power rule
log(5^2 x^3*2) + log((x^2 + 6)^(1/3))

log(25x^6) + log((x^2 + 6)^(1/3))

quotient rule
log(25x^6 / (x^2 + 6)^(1/3))
Sphinxa [80]3 years ago
4 0

Answer: =log_5\ (25\ x^6\ \sqrt[3]{x^2+6})


Step-by-step explanation:

Given log expression  2log_5(5x^3)+\frac{1}{3} log_5((x^2)+6).

First we would apply log rule of exponents : nlog_b(a) = log_b(a)^n

2log_5(5x^3)+\frac{1}{3} log_5((x^2)+6) = log_5(5x^3)^2+ log_5((x^2)+6)^{\frac{1}{3}}.

Converting rational exponent into radical form, we get

log_5(5x^3)^2+ log_5\sqrt[3]{((x^2)+6)}.

Simplifying (5x^3)^2 = 5^2x^{3\times 2} = 25x^6

= log_5(25x^6)+ log_5\sqrt[3]{((x^2)+6)}.

Applying sum of logs rule log_b(m)+log_b(n) = log_b(m\times n).

=log_5\ (25\ x^6\ \sqrt[3]{x^2+6})

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