数学计算题求解
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1)原式={(x+2)/[x(x-2)]-(x-1)/(x-2)^2}*x/(x-4)
=[(x+2)(x-2)-x(x-1)]/[(x-4)(x-2)^2]
=(x^2-4-x^2+x)/[(x-4)(x-2)^2]
=1/(x-20^2.
4)原式=(2√6-√2/2+√6/3-√6/3)*√6
=(2√6-√2/2)*√6
=12-√3.
5)x/[x(x+1)]+1/[x(x-1)]=4/[(x+1)(x-1)],
两边都乘以x(x+1)(x-1),得2x-2+x+1=4x,
x=-1,这是增根,舍去.
=[(x+2)(x-2)-x(x-1)]/[(x-4)(x-2)^2]
=(x^2-4-x^2+x)/[(x-4)(x-2)^2]
=1/(x-20^2.
4)原式=(2√6-√2/2+√6/3-√6/3)*√6
=(2√6-√2/2)*√6
=12-√3.
5)x/[x(x+1)]+1/[x(x-1)]=4/[(x+1)(x-1)],
两边都乘以x(x+1)(x-1),得2x-2+x+1=4x,
x=-1,这是增根,舍去.
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