[(x-y)^3×(√x+√y)^(-3)+3(x√y-y√x)]/(x√x+y√y)
[(x-y)^3×(√x+√y)^(-3)+3(x√y-y√x)]/(x√x+y√y)
>;>;>;x,y,z=3,'three','3.0'>;>;>;x,y,z[3,'three','3.0']此运行结果是正确的
>;>;>;x,y,z=3,'three','3.0'>;>;>;x,y,z[3,'three','3.0']此运行结果是正确的
N=3x[sup]3[/]-2y[sup]4[/]其绝对误差为() A: △N=9x<sup>2</sup>△x-8y<sup>3</sup>△y B: △N=3△x+2△y C: △N=9x<sup>2</sup>△x+8y<sup>3</sup>△y D: △N=9△x-8△y
N=3x[sup]3[/]-2y[sup]4[/]其绝对误差为() A: △N=9x<sup>2</sup>△x-8y<sup>3</sup>△y B: △N=3△x+2△y C: △N=9x<sup>2</sup>△x+8y<sup>3</sup>△y D: △N=9△x-8△y
指出下列函数的复合过程:(1)y=cos2x;(2)y=e3x;(3)y=esin3x;(4)y=arcsin[1g(2x+1)]
指出下列函数的复合过程:(1)y=cos2x;(2)y=e3x;(3)y=esin3x;(4)y=arcsin[1g(2x+1)]
下列曲线中有拐点(0,0)的是[]. A: y=x2 B: y=x3 C: y=x4 D: y=x2/3
下列曲线中有拐点(0,0)的是[]. A: y=x2 B: y=x3 C: y=x4 D: y=x2/3
3、反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是..(A)v=kc(X)[c(Y)]2;(B)v=kc(X)[c(Y)]3/2;(C)v=k[c(X)]2c(Y);(D)v=k[c(X)]0[c(Y)]2 A: (A) v = k c (X)[c (Y)]2; B: (B) v = k c (X)[ c (Y)]3/2; C: (C) v = k[c (X)]2 c (Y); D: (D) v = k [c (X)]0[ c (Y)]2
3、反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是..(A)v=kc(X)[c(Y)]2;(B)v=kc(X)[c(Y)]3/2;(C)v=k[c(X)]2c(Y);(D)v=k[c(X)]0[c(Y)]2 A: (A) v = k c (X)[c (Y)]2; B: (B) v = k c (X)[ c (Y)]3/2; C: (C) v = k[c (X)]2 c (Y); D: (D) v = k [c (X)]0[ c (Y)]2
3 、 反应 X + 2Y → Z 是一个 2.5 级反应,下面的速率方程式中,可能正确的是 . . (A) v = k c (X)[ c (Y)] 2 ; (B) v = k c (X)[ c (Y)] 3/2 ; (C) v = k [ c (X)] 2 c (Y) ; (D) v = k [ c (X)] 0 [ c (Y)] 2
3 、 反应 X + 2Y → Z 是一个 2.5 级反应,下面的速率方程式中,可能正确的是 . . (A) v = k c (X)[ c (Y)] 2 ; (B) v = k c (X)[ c (Y)] 3/2 ; (C) v = k [ c (X)] 2 c (Y) ; (D) v = k [ c (X)] 0 [ c (Y)] 2
求y=-3sin(2x-π/3)x∈[-π,π]的单调递增区间
求y=-3sin(2x-π/3)x∈[-π,π]的单调递增区间
反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是()(A)v=kc(X)[c(Y)]2;(B)v=kc(X)[c(Y)]3/2;(C)v=k[c(X)]2c(Y);(D)v=k[c(X)]0[c(Y)]2 A: v = k c (X)[c (Y)]2; B: v = k c (X)[ c (Y)]3/2; C: v = k[c (X)]2 c (Y); D: v = k [c (X)]0[ c (Y)]2
反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是()(A)v=kc(X)[c(Y)]2;(B)v=kc(X)[c(Y)]3/2;(C)v=k[c(X)]2c(Y);(D)v=k[c(X)]0[c(Y)]2 A: v = k c (X)[c (Y)]2; B: v = k c (X)[ c (Y)]3/2; C: v = k[c (X)]2 c (Y); D: v = k [c (X)]0[ c (Y)]2
The result of the following program is ( ).x=[0,1,1,0,0]; y=[0,0,1,1,0]; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points
The result of the following program is ( ).x=[0,1,1,0,0]; y=[0,0,1,1,0]; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points