【单选题】【消耗次数：1】
函数f(x)=x^3-6x^2+9x-5的极小值为( )
①
1
②
-1
③
3
④
-5
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相关题目
【单选题】
设函数f(x)=ln(3x+1)+√(5-2x)+arcsinx的定义域是( )
①
(-1/3,5/2)
②
(-1,5/2)
③
(-1/3,1)
④
(-1,1)
【简答题】
解线性方程组<img class="jc-formula" data-tex="\begin{ cases } x_{ 1 }+3{ x }_{ 2 }-{ 2x }_{ 3 }+{ x }_{ 4 }=1 \\ 2{ x }_{ 1 }+5{ x }_{ 2 }-3{ x }_{ 3 }+{ x }_{ 4 }=3 \\ -3{ x }_{ 1 }+4{ x }_{ 2 }+8{ x }_{ 3 }-2{ x }_{ 4 }=4 \\ 6{ x }_{ 1 }-{ x }_{ 2 }-6{ x }_{ 3 }+4{ x }_{ 4 }=2 \end{ cases }" src="https://huaweicloudobs.ahjxjy.cn/9D3F9AFD766D2E70840A2BC2711DEC75.png" style="vertical-align: middle;"/>.
【简答题】
求解线性方程组<img class="jc-formula" data-tex="\begin{ cases } { x }_{ 1 }+{ x }_{ 2 }+{ x }_{ 3 }+{ x }_{ 4 }=1 \\ 3{ x }_{ 1 }+2{ x }_{ 2 }+{ x }_{ 3 }+{ x }_{ 4 }=-3 \\ \quad \quad \quad \quad \quad { x }_{ 2 }+3{ x }_{ 3 }+2{ x }_{ 4 }=5 \\ 5{ x }_{ 1 }+4{ x }_{ 2 }+3{ x }_{ 3 }+3{ x }_{ 4 }=-1 \end{ cases }" src="https://huaweicloudobs.ahjxjy.cn/F8FB85A63DD75F17C75DBA324F3C9E05.png" style="vertical-align: middle;"/>
【单选题】
设函数f(x)=e^x (x≠0)，那么f(x+1 )*f(x+2 )为( )
①
f(x+1)+f(x+2)
②
f(x+1+x_2)
③
f(x+1* x+2)
④
f(x+1/x+2)
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