高數(shù)(一)答案:
1-5.ACDAB;
6-10.DCBAB;
11、0;
12.cos(x+2);
13.e的(X-3)次方*dx;
14.5sinX+C;
15.In2;
16.1;
17.6X;
18.2Xdx-dy;
19.(x-1)/2=(y-2)/-1=(z-3)/3;
20.1;
21.1/2;
22.e的x次方*(x+1)
高數(shù)一:23,由f(x)'=1-1/x(x不等于0) 有f(x)'=1-1/x大于等于0時 函數(shù)f(x)=x-lnx單調(diào)遞增;當f(x)'=1-1/x小 于0時函數(shù)f(x)=x-lnx單調(diào)遞減,所以函數(shù)f(x)=x-lnx單調(diào)遞增區(qū)間是x大于等于1,和x<0;當0
1-5.ACDAB;
6-10.DCBAB;
11、0;
12.cos(x+2);
13.e的(X-3)次方*dx;
14.5sinX+C;
15.In2;
16.1;
17.6X;
18.2Xdx-dy;
19.(x-1)/2=(y-2)/-1=(z-3)/3;
20.1;
21.1/2;
22.e的x次方*(x+1)
高數(shù)一:23,由f(x)'=1-1/x(x不等于0) 有f(x)'=1-1/x大于等于0時 函數(shù)f(x)=x-lnx單調(diào)遞增;當f(x)'=1-1/x小 于0時函數(shù)f(x)=x-lnx單調(diào)遞減,所以函數(shù)f(x)=x-lnx單調(diào)遞增區(qū)間是x大于等于1,和x<0;當0