Help with Inequality with Exponents question

In summary, an inequality with exponents is a mathematical expression that uses exponents and a greater than or less than symbol to show that the values on either side of the inequality are not equal. To solve such an inequality, the variable with the exponent must be isolated and the properties of exponents can be used to simplify the expression. The same rules for solving equations with exponents can be applied, but the direction of the inequality symbol must also be considered. To graph an inequality with exponents, it can be rewritten in slope-intercept form and the line can be shaded based on the direction of the inequality symbol. Inequalities with exponents have real-life applications in modeling various situations such as population growth, compound interest, and physics problems
  • #1
magic_castle32
12
0
How do you prove the following?

[tex]7^{\sqrt{5}} > 5^{\sqrt{7}}[/tex]

Without calculators or working out [tex]{\sqrt{5}}[/tex], [tex]{\sqrt{7}}[/tex], of course.
 
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  • #2
Well, consider both numbers and raise them both to the power of square root of 5.

So we have
[tex]
7^5 \ and \ 5^{\sqrt{35}}
[/tex]

Now, consider the following:

[tex]
6 = \sqrt{36} > \sqrt{35}
[/tex]

So we can just compare 7^5 and 5^6. I'm sure you can calculate those by hand.
 

FAQ: Help with Inequality with Exponents question

What is an inequality with exponents?

An inequality with exponents is a mathematical expression that contains at least one exponent and a greater than or less than symbol, indicating that the values on either side of the inequality are not equal. For example, x^2 < 4 is an inequality with an exponent.

How do I solve an inequality with exponents?

To solve an inequality with exponents, you must first isolate the variable with the exponent on one side of the inequality. Then, you can either raise both sides of the inequality to the same power or use the properties of exponents to simplify the expression. Finally, you can solve for the variable and check if the inequality is true.

3. Can I use the same rules for solving equations with exponents on inequalities with exponents?

Yes, you can use the same rules for solving equations with exponents on inequalities with exponents. However, you must also pay attention to the direction of the inequality symbol and make sure to maintain the correct inequality throughout the solving process.

4. How can I graph an inequality with exponents?

To graph an inequality with exponents, you can first rewrite the expression in slope-intercept form, y = mx + b. Then, you can plot the y-intercept at b and use the slope, m, to determine additional points on the graph. Finally, you can shade the region above or below the line depending on the direction of the inequality symbol.

5. What are some real-life applications of inequalities with exponents?

Inequalities with exponents can be used to model various real-life situations, such as population growth, compound interest, and physics problems involving acceleration and velocity. They can also be used to represent limits and boundaries, such as minimum and maximum values in business and economics.

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