Question

1.b=log(a-2) (5-a)中,实数a的取值范围.

Answer 1

1.(a-2)(5-a)＞02＜a＜52.由题意可得lg(xy)=0,xy=1,x=-1,y=-1log2(x2+y2)=log2(2)=13.log2根号2=log2 2^(1/2) =1/24.a的3分之2次方 = 九分之四loga (2/3)^2=2/3loga(2/3)=1/3log2/3 a =3