## math_crasher 2 years ago what is the geometric mean of 3 and 7?

1. RiOT

To find the mean of something, you add the terms and then divide by the amount of them. So, they equal 10 and there are two of them. 10/2 = 5. The mean should be 5.

2. estudier

Square root of product

3. math_crasher

I thought I multiply the two and find the square root?

4. estudier

I repeat Square root of product

5. RiOT

Don't listen to me... O_O I may very well be wrong.

6. math_crasher

so I should square root 21?

7. estudier

Yes

8. math_crasher

but that just gets a weird number

9. estudier

If it was 3 numbers, then cube root of 3 multiplied together....

10. math_crasher

ah i see

11. estudier

It's just a different kind of average....

12. math_crasher

So would I do something like 2*square root of the product?

13. estudier

Nope, just sqrt 21, that's the GM

14. math_crasher

so I just leave it at square root 21?

15. estudier

Yup

16. math_crasher

why's that?

17. estudier

What do you mean?

18. math_crasher

why do i leave it at $\sqrt{21}$ ?

19. estudier

Is there something wrong with sqrt 21 ?

20. math_crasher

don't I have to actually sqaure root it and make it X *$\sqrt{X}$

21. math_crasher

or something like that?

22. estudier

I don't understand, the square root of 21 is roughly 4.5825, unless you are asked to give a decimal approximation, just leave it as sqrt 21

23. math_crasher

oh ok thanks

24. estudier

ur welcome