求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
函数\(y = {x^{ - 4}}{\rm{ + }}2{x^3} - 2x\)的导数为( ). A: \(4{x^3} + 6{x^2} - 2\) B: \( - 4{x^{ - 5}} + 6{x^2} - 2\) C: \( - 4{x^{ - 3}} + 6{x^2} - 2\) D: \( - 4{x^3} + 6{x^2} - 2\)
函数\(y = {x^{ - 4}}{\rm{ + }}2{x^3} - 2x\)的导数为( ). A: \(4{x^3} + 6{x^2} - 2\) B: \( - 4{x^{ - 5}} + 6{x^2} - 2\) C: \( - 4{x^{ - 3}} + 6{x^2} - 2\) D: \( - 4{x^3} + 6{x^2} - 2\)
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
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
下列程序段运行后的结果是()int x = 1;int y = 2;x += y + y;if (x < 5 && y <= 4) {System.out.println("1");} else if (x >= 5 || y > 4) {System.out.println("2");} else {System.out.println("error");} A: 无法编译 B: 程序报错 C: 1 D: 2
下列程序段运行后的结果是()int x = 1;int y = 2;x += y + y;if (x < 5 && y <= 4) {System.out.println("1");} else if (x >= 5 || y > 4) {System.out.println("2");} else {System.out.println("error");} A: 无法编译 B: 程序报错 C: 1 D: 2
【单选题】列双音节词语注明声调: (1)阴平(2)阳平(3)上声(4)去声(5)轻声 道德朋友礼貌局面篱笆 A. (5)(4)(2)(2)(3)(4)(2)(4)(2)(5) B. (4)(2)(2)(5)(3)(4)(2)(4)(2)(5) C. (4)(2)(2)(5)(3)(4)(4)(2)(5)(2) D. (5)(4)(2)(2)(4)(3)(2)(4)(2)(5)
【单选题】列双音节词语注明声调: (1)阴平(2)阳平(3)上声(4)去声(5)轻声 道德朋友礼貌局面篱笆 A. (5)(4)(2)(2)(3)(4)(2)(4)(2)(5) B. (4)(2)(2)(5)(3)(4)(2)(4)(2)(5) C. (4)(2)(2)(5)(3)(4)(4)(2)(5)(2) D. (5)(4)(2)(2)(4)(3)(2)(4)(2)(5)
for(int x=0; x <=5;x+=2){...}语句执行循环的次数是( )。 A: 3 B: 4 C: 5 D: 6
for(int x=0; x <=5;x+=2){...}语句执行循环的次数是( )。 A: 3 B: 4 C: 5 D: 6
执行以下语句的结果:dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项,结果有误! D: {"x":4,"y":2,"z":3,"a":5}
执行以下语句的结果:dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项,结果有误! D: {"x":4,"y":2,"z":3,"a":5}
已知4:x=2:5,则x=______.
已知4:x=2:5,则x=______.
【单选题】A=[3 4 5;4 2 6];B=[4 2 7];C=[A;B] 运行的结果为 A. [3 4 5 4 2 6 4 2 7] B. [3 4 4;4 2 2;5 6 7] C. [3 4 5;4 2 6;4 2 7] D. [4 2 7;3 4 5;4 2 6]
【单选题】A=[3 4 5;4 2 6];B=[4 2 7];C=[A;B] 运行的结果为 A. [3 4 5 4 2 6 4 2 7] B. [3 4 4;4 2 2;5 6 7] C. [3 4 5;4 2 6;4 2 7] D. [4 2 7;3 4 5;4 2 6]
假设x=4,y=5,下列哪个逻辑表达式是真的? A: !(x==4)^y!=5 B: x!=4^y==5 C: x==5^y==4 D: x!=5^y!=4
假设x=4,y=5,下列哪个逻辑表达式是真的? A: !(x==4)^y!=5 B: x!=4^y==5 C: x==5^y==4 D: x!=5^y!=4