还是发个常用代码对照表吧
| \\frac{a}{b} | |
| {x}^{ab} | |
| {x}_{12} | |
| \\sqrt{xyz} | |
| \\sqrt[{x}]{{y}} 或 \\sqrt%5B{x}%5D{{y}} | |
| \\log_{a}{x} | |
| C_{m}^{n} | |
| \\sqrt{a^2}=|a| | |
| \\sum_{k=1}^{n}{a_k} | |
| \\prod_{k=1}^{n}{a_k} | |
| \\lim_{k\o \\infty}{k^{-1}}=0 | |
| \\int_{a}^{b}{f(x)dx} | |
| \\pm1,\\mp1 | |
| \\Rightarrow,\\Leftarrow,\\Leftrightarrow | |
| \\ne,\\le,\\ge,\\equiv | |
| f'(x)\\in [a,b] 或 f'(x)\\in%5B a,b%5D | |
| \an{30^{\\circ}}=\\frac{1}{\\cot{30^{\\circ}}} | |
| \\pi,\\alpha,\\beta,\\gamma,\heta,\\lambda | |
| {a}\\cdot{b},{a}\imes{b},{a}\\div{b} | |
| \\Delta,\\bigtriangleup,\\odot,\\angle,\\perp | |
| \\forall,\\exists,\\emptyset | |
| {{n}\\choose{m}} | |
| f(x)={\\left\\lbrace{{1},{x>0}\\\\{0},{x<0}} |
