AP Calculus AB 微积分 积分

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/25 07:27:33

AP Calculus AB 微积分 积分
AP Calculus AB 微积分 积分
 

AP Calculus AB 微积分 积分
1D2不知道.

[a..b] ∫ f(x) dx = a+2b
[a..b] ∫ (f(x)+3) dx
=[a..b] ∫ f(x) dx + [a..b] ∫ 3 dx
=a+2b+ 3x | [a..b]
=a+2b+3b-3a
=5b-2a
(D) is the correct answer.
----------------------------...

全部展开

[a..b] ∫ f(x) dx = a+2b
[a..b] ∫ (f(x)+3) dx
=[a..b] ∫ f(x) dx + [a..b] ∫ 3 dx
=a+2b+ 3x | [a..b]
=a+2b+3b-3a
=5b-2a
(D) is the correct answer.
---------------------------------------
The Riemann Sum is given by the general formula:
sum(f(x[i])*(b-a)/n, i=1..n);
In this question, a=0, b=1, n=20, f(x)=√(x/20)
sum(√(x[i]/20))*(1-0)/20, i=1..n)
=1/20 * [√(1/20)+√(2/20)+...+√(20/20)]
So, (C) is the right answer.

收起