Question

ex 23 repedee, plssss​

Answer 1

Explicație pas cu pas:

4^n=(2^2)^n=2^(2n)

81=3^4

2^(2n)*(81+56-56)<=12^4

2^(2n)*3^4= (2^2*3)^4

2^(2n)*3^4=2^8*3^4

2n= 8, n=8:2, n= 4