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lg2+lg5=ѧ
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y=log2xy=log0.5xͼ A.ԭԳ B.xԳ C.yԳ ѧ
ֱ3x+4y-1=0Բ(x-1)2+(y-2)2=25λùϵA B C ཻD ȷѧ
ֱx+ay+2=02ax+3y+1=0ഹֱaѧ
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nʾkĺͣǸĴ򣩳Ϊnֳkֵһѧ
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(-1/2)-12-1/2(1/2)-1/22-1У A. (-1/2)-1B. 2-1/2C. (1/2)-1/2D.ѧ
֪log5[log3(log2x)]=0,x=A. 1B. 2C. 4D. 8ѧ
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