there‘s an error ，i can't deal with it，please give me a help

>> clear all,syms x; >> s=solve('(x+2)^x=2','x')

s =

0.69829942170241042826920133106081

>> xs=(s+2)^s ??? Error using ==> mupadmex Error in MuPAD command: Invalid left-hand side [_assign];

during evaluation of '(Dom::Matrix(Dom::ExpressionField()))::_power'

Error in ==> sym.sym>sym.mpower at 207 B = mupadmex('symobj::mpower',A.s,p.s);

[Wayne King]

Hi Tao, What version of MATLAB are you using?

I don't have any trouble with this in R2011b

[tao]

R2010b

Answer 1

[Andrei Bobrov]

variant of solution

syms x
s=solve((x+2).^x-2)

xs=(s+2).^s

use '.^'

[tao]

thank you. but why use '.^'? i think it's not an array.

[Andrei Bobrov]

"my" MuPAD return variable 's' as matrix - array, please see: http://imageshack.us/photo/my-images/36/smtimes.png/