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常见数学公式问题集下载
示例如下图：
示例代码：
usepackage{amsmath}
usepackage{cancel}
begin{align*}
& sum_{k=1}^n [1/k - 1/(k+1)] \
&= [1-1/2]+[1/2-1/3]+cdots+[1/n-1/(n+1)] \
&=[1-cancel{1/2}]+[cancel{1/2}-cancel{1/3}]+[cancel{1/3}-cancel{1/4}]cdots+[cancel{1/n}-1/(n+1)]qquad text{(texttt{cancel})}\
&=[1-bcancel{1/2}]+[bcancel{1/2}-bcancel{1/3}]+[bcancel{1/3}-bcancel{1/4}]cdots+[bcancel{1/n}-1/(n+1)]qquad text{(texttt{bcancel})}\
&=[1-xcancel{1/2}]+[xcancel{1/2}-xcancel{1/3}]+[xcancel{1/3}-xcancel{1/4}]cdots+[xcancel{1/n}-1/(n+1)]qquad text{(texttt{xcancel})}\
&=1-1/(n+1)
end{align*}
2
$$
bcancel{a+b}
$$
3
$$
a+xcancel{b-b}
$$
4
$$
cancelto{1234}{123+1234-123}
$$
$$
cancelto{text{Is it right?}}{frac 12 +frac 13 = frac 25}
$$
