# 在网页显示数学公式

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  When $$a \ne 0$$, there are two solutions to $$ax^2 + bx + c = 0$$ and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$


When $$a \ne 0$$, there are two solutions to $$ax^2 + bx + c = 0$$ and they are $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

$J_\alpha(x)=\sum_{m=0}^\infty \frac{(-1)^m}{m!\Gamma(m+\alpha+1)}{\left({\frac{x}{2}}\right)}^{2m+\alpha}$


$J_\alpha(x)=\sum_{m=0}^\infty \frac{(-1)^m}{m!\Gamma(m+\alpha+1)}{\left({\frac{x}{2}}\right)}^{2m+\alpha}$

http://www.360doc.com/content/14/0930/23/9482_413578190.shtml