Question

preciso de ajuda nesses exercícios ​

Answer 1

a) $x^{3} .x^{-7} .x^{6} =x^{3+(-7)+6} =x^{2}$

b) $x^{-1} /x^{-1}=x^{-1-(-3)} =x^{-1+3} =x^{2}$

c) $(x^{6})^{-2} =x^{6.(-2)}=x^{-12}$

d) $a^{9} .a^{-4} .a^{7} .a^{-15} =a^{9+(-4)+7+(-15)} =a^{-3}$