Destinyyyy
  • Destinyyyy
Can someone explain the answer... Evaluate Radical Expressions
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Destinyyyy
  • Destinyyyy
Evaluate-- (1/81)^ -1/4
Destinyyyy
  • Destinyyyy
I know that the correct answer is 3.. I got 9.. I can show my work if you want
Destinyyyy
  • Destinyyyy
@pooja195

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xapproachesinfinity
  • xapproachesinfinity
3^4=81 as my hint
Destinyyyy
  • Destinyyyy
Huh?? O.o
xapproachesinfinity
  • xapproachesinfinity
Realize that (1/81)^-1/4=(81)^1/4
Destinyyyy
  • Destinyyyy
Yes I know that
xapproachesinfinity
  • xapproachesinfinity
Them you are good I just told you 81=3^4
xapproachesinfinity
  • xapproachesinfinity
So why do you get 9
Destinyyyy
  • Destinyyyy
If your saying 3^4 is the answer that is incorrect
xapproachesinfinity
  • xapproachesinfinity
No iIdidn't say it is the answer just one step before the answer
xapproachesinfinity
  • xapproachesinfinity
Why did I make it 3^4 if you think about it
Destinyyyy
  • Destinyyyy
(1/81)^-1/4 = 1/(1/81)^1/4 = 1/^4square root 1/81 --> square root 1/81 = 1/9 1/square root 1/81 = 1/ (1/9) = 1*9/1=9 Where did I go wrong? I followed the example
xapproachesinfinity
  • xapproachesinfinity
The answer is 3 like you said I'm just giving the why it is the answer
Destinyyyy
  • Destinyyyy
Oh.. Um not sure
xapproachesinfinity
  • xapproachesinfinity
Lol incorrect footsteps that's why it is wrong
Destinyyyy
  • Destinyyyy
How? I followed the example that I was given
xapproachesinfinity
  • xapproachesinfinity
Didn't I jut wrote (1/81)^-1/4=(81)^1/4 So we have (3^4)^1/4
xapproachesinfinity
  • xapproachesinfinity
I thought you understood that step
Destinyyyy
  • Destinyyyy
I understand changing -1/4 to 1/4... I did that in the first step.
xapproachesinfinity
  • xapproachesinfinity
Now you have something like (a^n) ^m Which is a^(nxm) rule
xapproachesinfinity
  • xapproachesinfinity
You did but you didn't flip the fraction
Destinyyyy
  • Destinyyyy
What?? Can you show me your work? I dont understand what your saying.. I dont know what this is "Now you have something like (a^n) ^m Which is a^(nxm) rule "
xapproachesinfinity
  • xapproachesinfinity
But then you did that in the end however 9 is incorrect since 81=9^2 You used the wrong exponent to simplify
xapproachesinfinity
  • xapproachesinfinity
You should have used 3^4 not 9^2
xapproachesinfinity
  • xapproachesinfinity
That's exponent rule my dear
Destinyyyy
  • Destinyyyy
Okay... What I did like the example was square root 81 = 9.. So Im suppose to ignore square root and do 3*3*3*3= 3^4
xapproachesinfinity
  • xapproachesinfinity
Even if you used 9^2 You still end up with (9^2)^1/4=9^1/2=3
xapproachesinfinity
  • xapproachesinfinity
It is ni5 square root it 4th root
Destinyyyy
  • Destinyyyy
Um sure... I figured out what you were saying above but honestly your just confusing me.. Thanks for the help I think
xapproachesinfinity
  • xapproachesinfinity
Sorry I couldn't help more since I'm in the phone otherwise I would try to before precise
Destinyyyy
  • Destinyyyy
Yes Im not suppose to do square root just the fourth power like my other problems.. The example should have shown that.
xapproachesinfinity
  • xapproachesinfinity
Try to be precise *

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