A^loga b=b
5^(3+log5 2)=5^3*5^log5 2=5^3*2=125*2=250
3/x=x-2
x²-2x-3=0,x≠0
x1+x2=2 U x1*x2=-3
x1=-1⇒y1=-3
x2=3⇒y2=1
(-1;-3);(3;1)
.........................................
49^(1-0,5*log₇14)=49/49^(0,5*log₇14)=49/7^(2*0,5*log₇14)=
=49/7^log₇14=49/14=3,5.