Question

Can anybody help me with this?

Answer 1

`\textsf{When multiplying equal bases with different powers, the powers are added.}\\\sf{x^(-2)/(3).x^(6)/(7)}\\\\=x^{(-2)/(3)+(6)/(7)}\\\\=x^{(-2(7)+6(3))/(21)}\\=x^(4)/(21)`