+0  
 
0
205
8
avatar+597 

Hi good people!,

 

I tried this sum, however I'm not too sure about the \(3^{n-2}\)

 

\({8*3^n} \over 3^{n+2}-3^{n-2}\)

 

Thanx for the help!

 May 17, 2019
 #1
avatar+42 
+1

I think that the answer is \(\dfrac{9}{10}\)

 

/ᐠ。ꞈ。ᐟ\/ᐠ。ꞈ。ᐟ\/ᐠ。ꞈ。ᐟ\

 May 17, 2019
 #2
avatar+597 
+1

Hi yes, I got that answer, just was not sure if I handled the sum correctly. Thanx for your time..

juriemagic  May 17, 2019
 #3
avatar+42 
+1

If you got that answer, you probably handled the sum correctly.

 

/ᐠ。ꞈ。ᐟ\/ᐠ。ꞈ。ᐟ\/ᐠ。ꞈ。ᐟ\

detkitten  May 17, 2019
 #4
avatar+597 
+1

yeeeessss..abviously I then did, but before you cofirmed the answer, I was not sure..Thanx..

juriemagic  May 17, 2019
 #5
avatar
0

xxxxxxxxxxx

 May 17, 2019
edited by Guest  May 17, 2019
 #6
avatar+107426 
+1

\({8*3^n} \over 3^{n+2}-3^{n-2}\\~\\ {8*3^n} \over 3^n3^2\;-\:3^n3^{-2}\\~\\ {8*3^n} \over 3^n(3^2\;-\:3^{-2})\\~\\ \frac{8}{3^2\;-\:3^{-2}}\\~\\ 8 \div(9-\frac{1}{9})\\~\\ 8 \div(\frac{81}{9}-\frac{1}{9})\\~\\ 8 \div(\frac{80}{9})\\~\\ 8 \times(\frac{9}{80})\\~\\ 0.9\)

.
 May 17, 2019
 #7
avatar+597 
+2

hello my dearest Melody...smileysmiley...thank you for the help, actually I was being just silly to post that sum, as it really was not that difficult to start with, and I should have known the answer I got was right, anyways thanks again...I do however have one or two sums for today that I REALLY have not a clue how to do...

juriemagic  May 20, 2019
edited by juriemagic  May 20, 2019
 #8
avatar+107426 
+1

Maybe you should have included the links  wink

Melody  May 20, 2019

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