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: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
(1)5 7 9 11() () ()()(2)26 23 20 17()() 8()(3)1 2 4 7 11() () 29(4)7 3 8 3 9 3()()(5)1 1 2 3 5 8()()
(1)5 7 9 11() () ()()(2)26 23 20 17()() 8()(3)1 2 4 7 11() () 29(4)7 3 8 3 9 3()()(5)1 1 2 3 5 8()()
利用行列式的性质计算下列行列式的值1 2 0 0 02 5 0 0 0 9 8 1 2 37 6 4 5 65 4 7 8 9
利用行列式的性质计算下列行列式的值1 2 0 0 02 5 0 0 0 9 8 1 2 37 6 4 5 65 4 7 8 9
输出九九乘法表。 1 2 3 4 5 6 7 8 9 --------------------------------------------------------------------- 1*1=1 2*1=2 2*2=4 3*1=3 3*2=6 3*3=9 4*1=4 4*2=8 4*3=12 4*4=16 5*1=5 5*2=10 5*3=15 5*4=20 5*5=25 6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36 7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49 8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64 9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
输出九九乘法表。 1 2 3 4 5 6 7 8 9 --------------------------------------------------------------------- 1*1=1 2*1=2 2*2=4 3*1=3 3*2=6 3*3=9 4*1=4 4*2=8 4*3=12 4*4=16 5*1=5 5*2=10 5*3=15 5*4=20 5*5=25 6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36 7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49 8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64 9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
下列数组中写法中错误的是( )。 A: [1:9] B: 1:9 C: [1:2:9;2:2:8] D: [1:3;4:6;7:9]
下列数组中写法中错误的是( )。 A: [1:9] B: 1:9 C: [1:2:9;2:2:8] D: [1:3;4:6;7:9]
【单选题】4、 1/2 , 1 , 1 ,(), 9/11 , 11/13 A 、 2 ; B 、 3 ; C 、 1 ; D 、 7/9 ; A. 2 B. 3 C. 1 D. 7/9
【单选题】4、 1/2 , 1 , 1 ,(), 9/11 , 11/13 A 、 2 ; B 、 3 ; C 、 1 ; D 、 7/9 ; A. 2 B. 3 C. 1 D. 7/9
打印九九乘法表,要求格式为: 1*1=1 1*2=2 2*2=4 1*3=3 2*3=6 3*3=9 1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81 程序填空: #include void main() { int i,j; for(i=1; ;i++) { for(j=1; ;j++) printf("%d*%d=%d\t", ); ; } }
打印九九乘法表,要求格式为: 1*1=1 1*2=2 2*2=4 1*3=3 2*3=6 3*3=9 1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81 程序填空: #include void main() { int i,j; for(i=1; ;i++) { for(j=1; ;j++) printf("%d*%d=%d\t", ); ; } }
Write out the following fractions, decimals and percentages. 1/2 , 1/3, 2/3, 1/4, 3/4 , 1/5 , 4/5, 9/10, 19/56, 31/144, 9⅔ ,
Write out the following fractions, decimals and percentages. 1/2 , 1/3, 2/3, 1/4, 3/4 , 1/5 , 4/5, 9/10, 19/56, 31/144, 9⅔ ,
下列C51的数据类型中,与标准C语言相同的是()。(1)int(2)指针(3)bit(4)float(5)char(6)sfr(7)sfr16(8)sbit(9)long A: (1)(2)(4)(9) B: (1)(2)(4)(5)(9) C: (1)(3)(8)(9) D: (1)(2)(5)(9)
下列C51的数据类型中,与标准C语言相同的是()。(1)int(2)指针(3)bit(4)float(5)char(6)sfr(7)sfr16(8)sbit(9)long A: (1)(2)(4)(9) B: (1)(2)(4)(5)(9) C: (1)(3)(8)(9) D: (1)(2)(5)(9)