Math Stumper

dopcombo

Golden Member
Nov 14, 2000
1,394
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e^x^x^x.... =10

x^x^x^x.... = ln 10

x^(x^x^x...) = ln 10

x^(ln 10) = ln 10

x = (ln 10)^(1/ln 10)

?
 

MrCodeDude

Lifer
Jun 23, 2001
13,674
1
76
Originally posted by: dopcombo
e^x^x^x.... =10

x^x^x^x.... = ln 10

x^(x^x^x...) = ln 10

x^(ln 10) = ln 10

x = (ln 10)^(1/ln 10)

?
Thank you, I'll tell you if you were correct tomorrow.
 

chuckywang

Lifer
Jan 12, 2004
20,133
1
0
this is just one of those recursive problems.....just have to be careful that it actually converges. not a problem for this problem.
 

Goosemaster

Lifer
Apr 10, 2001
48,775
3
81
if x=0, then the answer would be 1.

Looks like it is taylor polynomials...:(...x^x.......should approach ln10
 

chuckywang

Lifer
Jan 12, 2004
20,133
1
0
Originally posted by: Goosemaster
if x=0, then the answer would be 1.

Looks like it is taylor polynomials...:(...x^x.......should approach ln10


you sure about that?
if x = 0, then 0^0^0^ .... = y, which implies that 0^y = y which has no solution.
 

Goosemaster

Lifer
Apr 10, 2001
48,775
3
81
whoops....I forgot about e..I meant that e^0=1 , so with laylor polynomails the ploynomaial functions would approach 10...not ln10.

Poor bastard..I hated these type of problems....what was it again: x^0 + (x-n)^N/n!....


 

chuckywang

Lifer
Jan 12, 2004
20,133
1
0
Originally posted by: Goosemaster
whoops....I forgot about e..I meant that e^0=1 , so with laylor polynomails the ploynomaial functions would approach 10...not ln10.

Poor bastard..I hated these type of problems....what was it again: x^0 + (x-n)^N/n!....

e^x = SUM(x^n/n!,n,0,infinity). I'm not sure what you mean when you say the taylor polynomials would appraoch 10.
 

dopcombo

Golden Member
Nov 14, 2000
1,394
0
0
Originally posted by: MrCodeDude
Originally posted by: dopcombo
e^x^x^x.... =10

x^x^x^x.... = ln 10

x^(x^x^x...) = ln 10

x^(ln 10) = ln 10

x = (ln 10)^(1/ln 10)

?
Thank you, I'll tell you if you were correct tomorrow.

MrCodeDude, Eheh, were TuxDave and I right? Or was it some other way of converging it?