2/1[3/2(2/3x-1)]=12/x 急要!
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2/1[3/2(2/3x-1)]=12/x 急要!
2/1[3/2(2/3x-1)]=12/x 急要!
2/1[3/2(2/3x-1)]=12/x 急要!
2/1[3/2(2/3x-1)]=12/x
3/1(2/3x-1)]=12/x
两边乘12
4(2/3x-1)=x
6x-4=x
6x-x=4
5x=4
x=4÷5
x=5/4
(x-y)-3x+3y-2=
=5(x-y)-3(x-y)-2
=2(x-y)-2
=2×3-2
=4tan(60°-α)tan(30°+α)
=tan(60°-α)cot[90°-(30°+α)]
=tan(60°-α)cot(60°-α)
=tan(60°-α)×1/tan(60°-α)
=1
(X+1)X(X+2)X(X+3)=504
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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