1.求 (x^2+4x)/(x^2-2x+1+4x)的最大值2.已知集合A={z| |z-2|≤2,z∈C},集合B={w|w=(1/2)zi+b,b∈R}当A∩B=B时,b的值是____.= =
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已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10)
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求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
求|x-2|+|x-4|
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(x/x-2-x/x+2)/4x/x-2
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