用定积分求第四大题1,3小题详解
1个回答
展开全部
4、
(1) V=∫(0,1)π[e^(2x)-e^(-2x)]dx
=[1/2e^(2x)+1/2e^(-2x)]|(0,1)
=1/2[e^(2×1)-e^(2×0)]+1/2[e^(-2×1)-e^(-2×0)]
=1/2(e^2-1)+1/2[e^(-2)-1]
=1/2[e^2+e^(-2)]-1
(3) V=∫(0,1) (y-y^4)dy
=(1/2y^2-1/5y^5)|(0,1)
=1/2(1^2-0^2)-1/5(1^5-0^5)
=1/2-1/5
=5/10-2/10
=3/10
(1) V=∫(0,1)π[e^(2x)-e^(-2x)]dx
=[1/2e^(2x)+1/2e^(-2x)]|(0,1)
=1/2[e^(2×1)-e^(2×0)]+1/2[e^(-2×1)-e^(-2×0)]
=1/2(e^2-1)+1/2[e^(-2)-1]
=1/2[e^2+e^(-2)]-1
(3) V=∫(0,1) (y-y^4)dy
=(1/2y^2-1/5y^5)|(0,1)
=1/2(1^2-0^2)-1/5(1^5-0^5)
=1/2-1/5
=5/10-2/10
=3/10
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询