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write each equation in its equivalent logarithmic form. $$b^{3}=343$$

Short Answer

Expert verified
The logarithmic form of the equation \(b^{3} = 343\) is \(\log_{b}343 = 3\).

Step by step solution

01

Identify the Base, Exponent, and Answer in the Exponential Form

In the given equation, \(b^{3} = 343\), 'b' is the base, '3' is the exponent, and '343' is the result of the exponential operation.
02

Switch to the Logarithmic Form

Using the rule \(b^{y} = x\) is equivalent to \(\log_{b}{x} = y\), we rewrite the given equation in logarithmic form. The base \(b\) of the exponential becomes the base of the log, the result '343' becomes the number we are taking the log of, and the exponent '3' becomes the result of the log. We get: \(\log_{b}343 = 3\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Exponential to Logarithmic Form
Understanding how to move from exponential form to logarithmic form is essential for students tackling algebra and advanced mathematics. The process involves reconfiguring an equation so the exponent becomes the focus. For instance, when we have an equation like b^{3} = 343, the transition starts by identifying the three components: the base (b), the exponent (3), and the result of the base taken to the exponent (343).

The rule to keep in mind here is that an exponential equation can be expressed in logarithmic form as follows: if b^{y} = x, then log_b x = y. Applying this rule, we can convert the original equation into its logarithmic counterpart: log_b 343 = 3. This transformation is pivotal as it unlocks the use of logarithms to solve equations that would otherwise be difficult or impossible to manage with standard algebraic tools.
Properties of Logarithms
Logarithms come with a rich set of properties that simplify complex mathematical operations. Some key properties include the product rule, which states that log_b(x * y) = log_b x + log_b y, allowing us to add logarithms instead of multiplying numbers.

Another crucial property is the quotient rule: log_b(x / y) = log_b x - log_b y, used to convert division into subtraction. Additionally, the power rule, log_b(x^y) = y * log_b x, implies that an exponent inside a logarithm can be brought out as a multiplier. There's also the change-of-base formula, useful when converting between different logarithmic bases: log_b x = (log_c x) / (log_c b), where c is a new base of our choice.
These properties are not just mathematical curiosities; they are tools that greatly aid in simplifying and solving logarithmic equations. Recognizing and applying them appropriately helps to unravel equations that might look impenetrable at first glance.
Solving Exponential Equations
When tackling exponential equations, the key is often to isolate the term with the exponent. Let's apply some critical thinking to exponential equations like b^y = x. If we want to solve for y, it may not be feasible to do so through typical algebraic manipulation, especially if b and x are not neatly matched powers. Here, logarithms come to the rescue.

By converting to logarithmic form, log_b x = y, we make y the subject of the equation, which we can now solve for. In cases where the base b is not immediately obvious, we may employ logarithms of a base that is most convenient for us, typically base 10 (common logarithms) or base e (natural logarithms), and then use the aforementioned properties to simplify.

Logarithms thus serve as a bridge between forms, allowing us to move from the realm of the exponential where direct solving is difficult, to a logarithmic landscape where the tools of algebra are much more effective. For students, mastering this bridge equates to unlocking a new level of mathematical problem-solving prowess.

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Most popular questions from this chapter

Describe the product rule for logarithms and give an example.

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