tolong bantu Jwb y pake caranya. Cepat

1) 16.2^8/2^10=2^4.2^8/2^10
                       =2^(4+8)/2^10
                      =2^12/2^10
                      =2^(12-10)=2^2=4
2) (a^2.b^3).(a^2.b^4)^-1=(a^2.b^3).1/a^2.b^4
                                        =(a^2.b^3/a^2.b^4
                                        =(a^2-2 . b^3-4)
                                        =a^0 b^-1
                                        =1 . b^-1
                                        b^-1=1/b