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lg2+lg5=ѧ
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ABCڽ֮Ϊ3:2:1,ε״Ϊѧ
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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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гǼѧ
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nʾkĺͣǸĴ򣩳Ϊnֳkֵһѧ
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