1. Slide

60 seconds

An nth root is a number that can be multiplied by itself a certain number of times to get another number. For example, the 9th root of a number is the number that when multiplied by itself 9 times equals the original number. For instance, the 9th root of 7,776 is 8 because 8 x 8 x 8 x 8 x 8 x 8 x 8 x 8 x 8 = 7,776.

What is an nth root?

2. Slide

60 seconds

Nth Root: A number, x, is said to be an nth root of another number, y, if x^n = y. For example, 2 is a square root of 4, because 2^2 = 4. Radicand: The number that is being rooted, or the number being inside the radical sign, is called the radicand. Root Index: The root index is the number written in the small number in the left corner of the radical. For example, in √9, the root index is 2. This means the root of 9 is 2.

Concepts:

3. Slide

60 seconds

4. Slide

60 seconds

The nth root of a number can be expressed as an exponent of the same number. For example, the 9th root of a number can be expressed as the number to the power of 1/9. The nth root of a number is the inverse operation of taking the nth power of a number. For example, the square root of a number is the inverse operation of taking the square power of the same number. The nth root of a number can be calculated with the help of a calculator, as long as the number is not a perfect power of the same number. For example, the 9th root of a number can be calculated with a calculator, but the 9th power of the number cannot be calculated without a calculator.

Did you know?

5. Open question

180 seconds

Work together in pairs: What is the definition of an nth root?

6. Slide

60 seconds

Answer the questions on self check quiz

Google classroom

7. Drawings

450 seconds

Brain break: Draw a spaceship blasting off from a cowboy's hat

8. Poll

60 seconds

What does the 'n' represent in nth root?

- The degree of the root
- The base of the root
- The exponent of the root

9. Poll

60 seconds

What is the square root of 144?

- 12
- -12
- 24

10. Poll

60 seconds

What is the cube root of 27?

- 3
- 9
- 81

11. Poll

60 seconds

What is another term for 'nth' roots?

- Radicals
- Fractions
- Exponents

12. Poll

60 seconds

Which number when cubed gives us 125?

- 5
- 25
- 125

13. Slide

60 seconds

4/19 homework page 410 24-52 by 3's go to practice worksheet on google classroom

Homework

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