求-3到3{(根号下9-x^2)—X^3}的定积分
求-3到3{(根号下9-x^2)—X^3}的定积分
设f(x)=ln(9-x^2),则f(x)的连续区间是() A: (-∞,-3) B: (3,+∞) C: [-3,3] D: (-3,3)
设f(x)=ln(9-x^2),则f(x)的连续区间是() A: (-∞,-3) B: (3,+∞) C: [-3,3] D: (-3,3)
定积分s(9-x^2)^1/2dx上限3.下限-3
定积分s(9-x^2)^1/2dx上限3.下限-3
表示x是5的倍数或是9的倍数的逻辑表达式为 ____。 A: x \ 5 = 0 Or x \ 9 = 0 B: x \ 5 = 0 And x \ 9 = 0 C: x Mod 5 = 0 Or x Mod 9 = 0 D: x Mod 5 = 0 And x Mod 9 = 0
表示x是5的倍数或是9的倍数的逻辑表达式为 ____。 A: x \ 5 = 0 Or x \ 9 = 0 B: x \ 5 = 0 And x \ 9 = 0 C: x Mod 5 = 0 Or x Mod 9 = 0 D: x Mod 5 = 0 And x Mod 9 = 0
int x,y; x=9%5; y=9/5 则x=,y=。
int x,y; x=9%5; y=9/5 则x=,y=。
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: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
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: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
执行以下代码之后,x、y的值分别为多少?varx,y=9;x=y++; A: x为9,y为9 B: x为10,y为10 C: x为10,y为9 D: x为9,y为10
执行以下代码之后,x、y的值分别为多少?varx,y=9;x=y++; A: x为9,y为9 B: x为10,y为10 C: x为10,y为9 D: x为9,y为10
下面代码的输出结果是()。def f(): global x x=198 print(x) x=9 f() print(x) A: 198 198 B: 198 9 C: 9 198 D: 出错
下面代码的输出结果是()。def f(): global x x=198 print(x) x=9 f() print(x) A: 198 198 B: 198 9 C: 9 198 D: 出错
设函数$y = f({x^3})$可导,求函数的二阶导数$y'' = $( ) A: $6xf'({x^3}) + 9{x^4}f''({x^3})$ B: $6f'({x^3}) + 9{x^3}f''({x^3})$ C: $6xf'({x^3}) + 9{x^3}f''({x^3})$ D: $6{x^2}f'({x^3}) + 9{x^3}f''({x^3})$
设函数$y = f({x^3})$可导,求函数的二阶导数$y'' = $( ) A: $6xf'({x^3}) + 9{x^4}f''({x^3})$ B: $6f'({x^3}) + 9{x^3}f''({x^3})$ C: $6xf'({x^3}) + 9{x^3}f''({x^3})$ D: $6{x^2}f'({x^3}) + 9{x^3}f''({x^3})$
下面代码的输出结果是()。def f(): x=198 print(x) x=9 f() print(x) A: 198 198 B: 198 9 C: 9 198 D: 出错
下面代码的输出结果是()。def f(): x=198 print(x) x=9 f() print(x) A: 198 198 B: 198 9 C: 9 198 D: 出错