Pre-Algebra 29 - Roots and Unit Fraction Exponents

Exponents can not only be integers. They can also be fractions. Using the rules of exponents, we can see why a number raised to the power "one over n" is equivalent to the nth root of that number.

[iammarkjones]

You make the most abstract seem quite simple and understandable. Please keep up the fantastic work, and from those of us who self educate, rather than watching numb skulls eating cinnamon or whatever is hot this week. Thank You!

[venkatbabu]

Root two is parallel to two root two. Similarly root three to two root three. Cubic dimension is similar.

[marvinjaywalking]

Wow! Your videos are very interesting! It my make students love math.

[sbaker]

I am sooo glad to have this teaching, I was very bad in math, but after learning 1-28 with mywhyu I feel more confident with math, whoda' thunk". :)

[grosteffonsteve]

At 10:07 there should be a ± sign in front of the radical to indicate the positive and negative 6th roots of 64.

[HarleyPupper]

hey, square roots of negative numbers do exist, they just aren't on the real number line. These numbers are called imaginary numbers, or complex numbers.

[prince]

At 3:01 it is said "indicating the "negative" of the principal square root", but I thought principal square root itself means positive square root, shouldn't it be stated "indicating the negative square root" only? Because principal square root means positive square root, saying negative of principal square root would be saying negative of the positive square root, which sounds utterly confusing. Your insight would be much appreciated clearing this, looking forward to your response.

[donaldbridgeman]

How do you get + or - or ^ in front of square root symbol on calculator. My old Casio fx-115 had a symbol. However my new Casio Classpad200 dose not ? Help Bridgeman

[Brocaserter]

I always laugh when the infinite number sequence breaks something :D

[fangzachary]

i don't think it is correct that every positive number "a" has two even roots, it is should be odd roots sometimes , for instance the square root of 9 , in which result would be +/ - 3 .

[acerasphire]

thanks professor. von. anyway professor are u teaching basic geometry i mean preparatory geometry? thanks ill watch 21 again :)

[acerasphire]

:-( i cant get it.. damn.. any tips how to be good in math MyWhyu?

[farahjaber]

so an even root of negative is not real 4:45