y=x^xlny=xlnxy'/y=lnx+1y'=(x^x)(1+lnx)z=x^(x^x)lnz=(x^x)lnxz'/z=lnx*[(x^x)(1+lnx)]+(x^x)*1/x=[x^(x-1)]*[x(lnx)²+xlnx+1]z'=[x(lnx)²+xlnx+1]*[x^(x^x+x-1)]