http://www.mathway.com
抱怨数学老师布置了太多作业?或者自己不想费工夫去做低级重复的数学题?又或者你真的需要某道数学难题的正确答案?
Mathway 是一个不错的去处,在这里你只需输入数学式子就能得出答案,包括基础数学、初级代数、代数、初级微积分、微积分、三角函数等各种数学细分科目,且解题过程非常详细,还可以打印、分享、编辑。
很赞编写这个网站程序的主人,他确实没必要来做这种重复性的技术活儿了,同时还给这么多数学作业忧郁症患者带来了福利,——如果让他代写数学作业,肯定也不在话下。
下面来看我的示范,一个简单的不定积分:
题目:
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参考答案
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The integral of a constant with respect to x is the constant times x.
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To find the integral of
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find the anti-derivative. The formula for the anti-derivative of a basic monomial is
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The indefinite integral also has some unknown constant. This can be proven by completing the opposite operation (derivative) in which C would go to 0. The value of C can be found in cases when an initial condition of the function is given.
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