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I recieved this following question ; Write 85184^85184 as a power of 1936

Usually the prime factors of both of them are the same number making it easier but this time the prime factor involves two numbers. Me and my dad tried to solve this but couldn't find a way. Please help!

I have considered what you have said Melody and I powered through most of my homework using Cphill's method

 Jan 19, 2017

Best Answer 

 #8
avatar+37153 
+5

AFTER seeing Chris' answer, I found the error in mine

 

85184 = 44^3

 

(44^3)^(44^3)   = 44^(3x44^3) = 44^ (255552) = 44^(2 x 127776) = (44^2)^127776 = 1936^127776

 

as Chris found !

 Jan 19, 2017
 #1
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oh thats a hard one man....

 Jan 19, 2017
 #2
avatar+234 
+5

Ya, I'm in grade eight. With this question even my dad was connfuzzled! Resorting to this website as a last hope....

 Jan 19, 2017
 #3
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same yo laugh

coolboy21  Jan 19, 2017
 #4
avatar+234 
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How old are you? I'm getting this as an 13 year old, ridiculous!

HelpMeWithThisPlease  Jan 19, 2017
 #5
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i am 13 as well

 Jan 19, 2017
 #6
avatar+129899 
+5

Factor   85184  = 2^6 * 11^3  = [ 2^2 *11] [2^2 *11] [2^2 *11]   = [ 2^2 * 11]^3

 

Factor  1936  = 2^4 * 11^2  = [2^2 *11] [2^2 * 11]=   [2^2 *11]^2

 

So

 

85184   = ( [2^2 *11]^2])^(3/2) =   1936^(3/2)

 

So we have

 

[ 1936^3/2] ^ 85184 = 1936^127,776

 

 

 

cool cool cool

 Jan 19, 2017
 #7
avatar+37153 
+5

Nice job, Chris !    Looked at it for a while...didin't quite come up with that !

 Jan 19, 2017
edited by ElectricPavlov  Jan 19, 2017
 #8
avatar+37153 
+5
Best Answer

AFTER seeing Chris' answer, I found the error in mine

 

85184 = 44^3

 

(44^3)^(44^3)   = 44^(3x44^3) = 44^ (255552) = 44^(2 x 127776) = (44^2)^127776 = 1936^127776

 

as Chris found !

ElectricPavlov  Jan 19, 2017
 #9
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0

EP and CPhill: How in the world did you guys get:85,184^85,184 =1936^127, 776???!!!, when direct calculation of 85,184^85,184 =4.153186160584012410564019499453 x 10^419,987???.

 Jan 19, 2017
 #10
avatar+2511 
+5

Well, Mr. Blarney, they have shown their work. Now all you need is a brain – an active one, of course. Having a petrified pile of oatmeal in its place won’t do.

 

Here is an easier way using logarithms:

 

Write 85184^85184 as a power of 1936

.

\(\dfrac{85184*log(85184)}{log(1936)} =127776\\ \;\\ 85184^{85184} = 1936^{1227776}\)

 

 

 

Normally I wouldn’t bother presenting this for you, because it’s like trying to teach a pìg to sing, and doing that is a waste time and annoys the pìg. However, there may be a bright eleven-year-old who will understand this. It’s not that difficult, really--not for a bright eleven-year-old.

 Jan 19, 2017
edited by GingerAle  Jan 19, 2017
 #11
avatar+129899 
0

Thanks, GA....I didn't think about going the "log route"...that's certainly  more efficient  !!!

 

Oh well.....I guess we can teach some pigs to fall off a "log"...others???.....Mmmm.....

 

 

 

cool cool cool

 Jan 19, 2017

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