x+1\x=5\2则x^3+1\x^3=_______quickly!
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x+1\x=5\2则x^3+1\x^3=_______quickly!x+1\x=5\2则x^3+1\x^3=_______quickly!x+1\x=5\2则x^3+1\x^3=_______qui
x+1\x=5\2则x^3+1\x^3=_______quickly!
x+1\x=5\2则x^3+1\x^3=_______
quickly!
x+1\x=5\2则x^3+1\x^3=_______quickly!
x十1/x=5/2
两边平方
x^2十1/x^2十2=25/4
即x^2十1/x^2=17/4
两边乘以x十1/x
x^3十x十1/x十1/x^3=17/4×5/2
即x^3十1/x^3十5/2=85/8
则x^3十1/x^3=65/8
(x+1/x)^2=x^2+1/x^2+2=25/4
则x^3+1/x^3=(x+1/x)(x^2-1+1/x^2)=(5/2)*(25/4-3)=65/8
*-----------------------------------------------*| 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 ||
(x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x(x-2)-2x(x+1)-3x(x-5) 其中x=负½
x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
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