1.
a) (3/4)^2= 3^2/4^2=9/16
b) (5/3)^2= 5^2/3^2=25/9
2.
a)(1 1/4)^2=(1+1/4)^2=(4/4+1/4)^2=(5/4)^2=25/16
b)(1 3/4)^2=(1+3/4)^2=(4/4+3/4)^2=(7/4)^2=49/16
3.
a)(0,5)^n=1/32 => (1/2)^n=1/32 = > (1/2)^n=(1/2)^5 => n=5
b)(1,5)^n=81/16 => (3/2)^n=81/16 => (3/2)^n=(3/2)^4 => n=4
restul subpunctelor sunt similare
