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anonymous
 one year ago
Express the following using inverse notation
1/(5x^3)
anonymous
 one year ago
Express the following using inverse notation 1/(5x^3)

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freckles
 one year ago
Best ResponseYou've already chosen the best response.3what do you mean by inverse notation?

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.2do u mean like  1/x = x^(1)

freckles
 one year ago
Best ResponseYou've already chosen the best response.3\[y=\frac{1}{5x^3}\] I think you mean to write this maybe and you are looking for inverse function?

freckles
 one year ago
Best ResponseYou've already chosen the best response.3I have no clue what you mean really

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The problem says "Express the following in inverse notation"

freckles
 one year ago
Best ResponseYou've already chosen the best response.3You can please define that for me.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ill take a picture of it

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.2i think you are talking about multiplicative inverse? u in 6or7th grade?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No Ive just been out of school for five years

freckles
 one year ago
Best ResponseYou've already chosen the best response.3\[\frac{1}{a}=a^{1}\] @imqwerty made a great guess earlier

freckles
 one year ago
Best ResponseYou've already chosen the best response.3oh I don't know why that is called inverse notation in your class you are just writing the expression with negative exponents instead *

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So where is a good place to practice this because I really don't have a clue how you go the answer.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3you see the exponent 3

freckles
 one year ago
Best ResponseYou've already chosen the best response.3\[\frac{1}{5x^3}=\frac{1}{5} \frac{1}{x^3}=\frac{1}{5} x^{3} \text{ use the rule I gave }\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.3bring that little part to the numerator and change the sign of the exponent

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That makes sense now.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3another example: \[\frac{5}{3(x+1)} \\ \frac{5}{3} \frac{1}{x+1}=\frac{5}{3} \frac{1}{(x+1)^1} \\ =\frac{5}{3}(x+1)^{1}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ah I see. This was easier than what I made it seem.

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{ 1 }{ 5x ^{3} } = y\] \[5y= \frac{ 1 }{ x ^{3} }\]

imqwerty
 one year ago
Best ResponseYou've already chosen the best response.2hey is it like the minus sign of the exponent is not written or m getting something wrng.....this has happened to me before http://prntscr.com/8bpkrt

Rushwr
 one year ago
Best ResponseYou've already chosen the best response.0I have this link for you if u aren't sure of what you are doing ! https://www.mathsisfun.com/sets/functioninverse.html

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1441192519704:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.3@milianbenja088321 I'm pretty certain "express the following using inverse notation" is not universal to mean \[\text{ to write } \frac{1}{a} \text{ as } a^{1}\] just so you know

freckles
 one year ago
Best ResponseYou've already chosen the best response.3is this an american class?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@freckles yeah i figured as much thats why I was looking for a site to practice on.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@freckles its an entrance exam

freckles
 one year ago
Best ResponseYou've already chosen the best response.3most of the sites I can find go backwards they want positive exponents instead of negative exponents

freckles
 one year ago
Best ResponseYou've already chosen the best response.3http://www.purplemath.com/modules/exponent2.htm but you can read it from solution to problem and it is the same thing :p

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@freckles its cool I appreciate all of your help. I will most certainly check the website out at this point anything will help.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3for example in this link: \[(3x)^{2}=\frac{(3x)^{2}}{1}=\frac{1}{(3x)^2} \\ \text{ you can read this as } \\ \frac{1}{(3x)^2}=\frac{(3x)^{2}}{1}=(3x)^{2}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks guys! I have to go. have a good day all!

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0The "inverse" was meant to be the "multiplicative inverse" and not the inverse of a function. It gets confusing when the context is not clear.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3@mathmate wouldn't the multiplicative inverse of \[\frac{1}{5x^3 } \text{ be } 5x^3 \text{ since } \frac{1}{5x^3} \cdot (5x^3)=1\] but they had \[\frac{1}{5}x^{3}\] so to me the question still makes no sense

freckles
 one year ago
Best ResponseYou've already chosen the best response.3they should have said write with negative exponents

freckles
 one year ago
Best ResponseYou've already chosen the best response.3and I based this on their solutions

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0I do not disagree with the answer (1/5)x^3 if the question was "Express the following using inverse notation" and not "Find the inverse of the following expression". Yes, I do find the question tricky, if not sneaky! :)

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0Context, context and context! At a particular grade, there is no confusion. Multiplicative inverse is probably the only one they have learned. I have seen questions asking for the inverse to mean negation, i.e. the additive inverse. It's the same as saying (in high school) "when the discriminant is negative, the quadratic equation has no root." It all depends on the context.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3but \[\frac{1}{5}x^{3} \text{ is \not the multiplicative inverse of } \frac{1}{5x^3}\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.3oh I think I get what you are saying so why wouldn't the answer be: \[(5x^3)^{1} \text{ instead }\]

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0They are asking to express the expression in inverse notation, not to find the inverse. So the value of the expression should stay the same, just the notation changes. This way we can safely say: 1/(5x^3) = (1/5)x^(3). "Express the following with negative exponents" is clear for us, but probably does not achieve the purpose getting the students to learn the term "inverse". Just a guess!

freckles
 one year ago
Best ResponseYou've already chosen the best response.3but (5x^3)^(1) is equivalent to the original expression and to me it is more an inverse notation because it actually obviously contains the multiplicative inverse inside the ( )^(1)

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0Yes, I agree that (5x^3)^(1) fits the concept of inverse even better. Some how I have the impression that the question is biased toward teaching the laws of exponents, so there! If I were to correct (manually), I would accept either option.

freckles
 one year ago
Best ResponseYou've already chosen the best response.3I still think the question would have been better phrased to just write with negative exponents. The answers to me our weird for inverse notation.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0Yes, I agree that "write with negative exponents" would be more suited for the "correct " answer.
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