1-x+2分之5括号除以x+3分之x^-9,其中x等于根号3-2
解 :(1-x+5/2)÷(x²-9)/(x+3)
=(7/2-x)*(x+3)/(x-3)(x+3)
=(7/2-x)/(x-3)
=(7/2-√3+2)/(√3-5)
=(11/2-√3)(√3+5)/(√3-5)(√3+5)
=(11√6+55√2-3-5√3)/(-22)
=-√6/2-5√2/2+3/22+5√3/22
(1)(1-x+5/2)÷x+[x^(-9)]/3
(2)(1-x+5/2)÷x+[(x/3)^(-9)]
1-x+2分之5括号除以x+3分之x^-9
x^-9是x的负9次方吗?
(1)(1-x+5/2)÷x+[x^(-9)]/3
(2)(1-x+5/2)÷x+[(x/3)^(-9)]
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