Math Problem Statement

Given that p = log 5 and q = log 2, write log 40 in terms of p and q.

Solution

We are asked to express log40\log 40 in terms of p=log5p = \log 5 and q=log2q = \log 2.

Solution:

First, we express 4040 as a product of prime factors: 40=23×540 = 2^3 \times 5 Now, applying the logarithmic property log(ab)=loga+logb\log(ab) = \log a + \log b, we get: log40=log(23×5)=log23+log5\log 40 = \log(2^3 \times 5) = \log 2^3 + \log 5

Using the power rule of logarithms log(ab)=bloga\log(a^b) = b \log a, this becomes: log40=3log2+log5\log 40 = 3 \log 2 + \log 5

Now substitute log5=p\log 5 = p and log2=q\log 2 = q: log40=3q+p\log 40 = 3q + p

Thus, log40\log 40 in terms of pp and qq is: log40=3q+p\log 40 = 3q + p

Would you like further explanation or have any questions about this solution?

Related Questions:

  1. How would you express log100\log 100 in terms of pp and qq?
  2. How does the change of base formula apply when rewriting logarithmic expressions?
  3. Can you express log25\log 25 in terms of pp and qq?
  4. How would you handle logarithms of non-integer values in terms of pp and qq?
  5. How would you simplify log(10)\log(10) in terms of pp and qq?

Tip:

Remember the key logarithmic properties: product rule log(ab)=loga+logb\log(ab) = \log a + \log b, quotient rule log(a/b)=logalogb\log(a/b) = \log a - \log b, and power rule log(ab)=bloga\log(a^b) = b \log a.

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Math Problem Analysis

Mathematical Concepts

Logarithms
Properties of Logarithms
Algebra

Formulas

log(ab) = log a + log b
log(a^b) = b log a

Theorems

Logarithmic Properties

Suitable Grade Level

Grades 10-12