Question

Rút gọn biểu thức : 28 mũ 15 nhân 3 mũ 17 trên 84 mũ 16

Answer 1

28^15x3^17/84^16

=28^15x3^17/(28x3)^16

=28^15x3^17/28^16x28^16

=3/28

Answer 2

=3/28

Answer 3

Rút gọn biểu thức:

\(\frac{28^{15}.3^{17}}{84^{16}}\)\(=\frac{\left(2^2.7\right)^{15}.3^{17}}{\left(2^2.3.7\right)^{16}}\)

                        \(=\frac{2^{30}.7^{15}3^{17}}{2^{32}.3^{16}7^{16}}\)

                          \(=\frac{3}{2^2.7}=\frac{3}{28}\)

Answer 4

\(\frac{28^{15}\cdot3^{17}}{84^{16}}\)

=\(\frac{28^{15}\cdot3^{17}}{28^{16}\cdot3^{16}}\)

=\(\frac{1\cdot3}{28\cdot1}\)(rut gon)

=\(\frac{3}{28}\)