7-24  žȡ
⣺Enterȷϡ
>> a=sym('[1,1/x,x^2;xin(x),cos(x),tan(x);log(x),1,7]') 
a = 
[      1,    1/x,    x^2]
[ xin(x), cos(x), tan(x)]
[ log(x),      1,      7]
>> rank(a)
ans =
3
>>
