Solve log₉(74) + log₉(1/2): Logarithm Addition Problem

log974+log912= \log_974+\log_9\frac{1}{2}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:05 We'll use the formula for adding logarithms
00:11 We'll use this formula in our exercise
00:16 Note that the bases are equal
00:31 Let's calculate the parentheses
00:38 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

log974+log912= \log_974+\log_9\frac{1}{2}=

2

Step-by-step solution

To solve this problem, we'll apply the following steps:

  • Step 1: Identify given logarithms and their base.
  • Step 2: Employ the sum of logarithms property to combine the terms.
  • Step 3: Calculate the resulting argument of the logarithm.

Now, let's work through each step:

Step 1: We have two logarithms: log974\log_9 74 and log912\log_9 \frac{1}{2}, sharing the base of 99.

Step 2: Since the bases are the same, we use the sum property of logarithms:

log974+log912=log9(74×12)\log_9 74 + \log_9 \frac{1}{2} = \log_9 (74 \times \frac{1}{2}).

Step 3: Calculate the product 74×1274 \times \frac{1}{2}:

74×12=3774 \times \frac{1}{2} = 37.

So, we have:

log9(74×12)=log937\log_9 (74 \times \frac{1}{2}) = \log_9 37.

Therefore, the solution to the problem is log937\log_9 37.

3

Final Answer

log937 \log_937

Practice Quiz

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\( \log_{10}3+\log_{10}4= \)

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