A.syms x; f=x^2/(1+x^2); int(f,x)
B.syms x; f=x^2/1+x^2; int(f,x)
C.f=x^2/(1+x^2); int(x,f)
D.f=x^2/1+x^2; int(x,f)
- · 有3位网友选择 A,占比33.33%
- · 有2位网友选择 D,占比22.22%
- · 有2位网友选择 C,占比22.22%
- · 有2位网友选择 B,占比22.22%
A.syms x; f=x^2/(1+x^2); int(f,x)
B.syms x; f=x^2/1+x^2; int(f,x)
C.f=x^2/(1+x^2); int(x,f)
D.f=x^2/1+x^2; int(x,f)
A.-√(x-1)(x≥1)
B.x2+1(-∞<x<+∞)
C.x2+1(x≤0)
D.x2+1(x≥0)
A.沿x轴正向下降且凹 B.沿x轴正向下降且凸
C.沿x轴正向上升且凹 D.沿x轴正向上升且凸
A、f=(1-x^2+2sqrt(x))/(x*sqrt(x)); int(f,x)
B、f=(1-x^2+2*sqrt(x))/(x*sqrt(x)); int(f,x)
C、syms x; f=(1-x^2+2*sqrt(x))/(x*sqrt(x)); int(f,x)
D、syms x; f=(1-x^2+2sqrt(x))/(x*sqrt(x)); int(f,x)
A、f=(sin(x/2))*2; int(f,x)
B、f=(sin(x/2))^2; int(f,x)
C、syms x; f=(sin(x/2))*2; int(f,x)
D、syms x; f=(sin(x/2))^2; int(f,x)
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