函数f(x)=的全部间断点为
A: x=-1及x=4
B: x=-1及x=-4
C: x=1及x=-4
D: x=1及x=4
A: x=-1及x=4
B: x=-1及x=-4
C: x=1及x=-4
D: x=1及x=4
举一反三
- 求函数$f(x)=x^4 $在$x=-1$的导数 A: $4$ B: $1$ C: $-1$ D: $-4$
- A={X|X≤1},B={X|X>-4},则A∩B=__________. A: {X|X≤1} B: {X|x>-4} C: {X|-4
- 求不定积分[img=112x35]17da6538063a9e4.png[/img]； （ ） A: (x^4*log(x)^2)/4 + (x^4*(log(x) - 1/4))/ B: (x^4*log(x)^2)/4 - (x^4*(log(x) - 1/4))/8 C: (x^4*log(x)^2)/4 - (x^4*(log(x) - 1/4)) D: (x^4*log(x)^2)/4 + (x^4*(log(x) - 1/4))/8
- 以4，9，1为为插值节点，求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
- {x丨x>1}∩{x丨x>4}=() A: {2，3} B: {x|x>1} C: {x丨x>4} D: 空集