## anonymous one year ago ** Help please**

1. anonymous

What is "n" in this equation? |dw:1442011040038:dw|

2. anonymous

A n = 4 B n = 5 C n = 6 D n = 7

3. Nnesha

n is index so you can try all options one by one for example first one replace n with n |dw:1442011513344:dw| now take 4th root if you get equal sides then 4 would be ur answer

4. anonymous

How do I work these out? o.O

5. Nnesha

without calculator ?

6. Nnesha

oh alright so you can convert root to an exponent form $\huge\rm \sqrt[n]{x^m}=x^\frac{ m }{ n }$ |dw:1442011674088:dw| now you have to write 16807 in terms of 7 base

7. Nnesha

understood ?

8. anonymous

kinda... :(

9. Nnesha

7 to the what power = 16807 ?