[tex] \frac{x*x^2*x^3*...*x ^{20} }{x*x^3*x^5*..*x ^{19}} -se /simplifica \\ \\ x^{2} *x^4*x^6*...* x^{20} = \\ \\ =x ^{2+4+6+...+20} = \\ \\ =x^{2(1+2+3+...+10)}= \\ \\ = x^{2(10*11:2)} \\ \\ = x^{2*55} = \\ \\ = (x^{55} )^{2} - patrat / perfect[/tex]
