# What is the relationship between exponentials and logarithms?

## What is the relationship between exponentials and logarithms?

Logarithmic functions are the inverses of exponential functions. The inverse of the exponential function y = ax is x = ay. The logarithmic function y = logax is defined to be equivalent to the exponential equation x = ay.

## What is a reciprocal graph?

A graph of the form y = 1 x is known as a reciprocal graph and once drawn, looks like this: x. -5. -4.

What is the first step in solving logarithmic inequalities?

Step 1: Replace the inequality with an equal sign. Step 2: With an exponent, use logarithms; with a logarithm, raise to the power of the base. Step 3: Solve. Step 4: Evaluate.

### Why can’t logarithms have a base of 1?

And if those numbers can’t reliably be the base of a power function, then they also can’t reliably be the base of a logarithm. So in summary, because the we only allow the log’s base to be a positive number not equal to 1, that means the argument of the logarithm can only be a positive number.

### When to use exponentiate or e in logarithm equation?

As with the last example, first combine the logarithms into a single logarithm. Now exponentiate, using 10 this time instead of e because we’ve got common logs in the equation, both sides. So, potential solutions are x = 5 x = 5 and x = − 2 x = − 2.

How to solve an equation with a logarithmic formula?

Using a calculator for approximation, x ≈ 12.770. To solve an equation involving logarithms, use the properties of logarithms to write the equation in the form log bM = N and then change this to exponential form, M = b N .

## Which is the solution to the exponential equation?

So, the first step here is to move everything to one side of the equation and then to factor out the x 2 − 4 x 2 − 4. At this point all we need to do is set each factor equal to zero and solve each. The three solutions are then x = ± 2 x = ± 2 and x = 5.3906 x = 5.3906.

## What’s the difference between quadratic and logarithm equations?

The only difference between this quadratic equation and those you are probably used to seeing is that there are numbers in it that are not integers, or at worst, fractions. In this case the constant in the quadratic is just − 2 − e 2 − 2 − e 2 and so all we need to do is use the quadratic formula to get the solutions.