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使用包含逐步求解过程的免费数学求解器解算你的数学题。我们的数学求解器支持基础数学、算术、几何、三角函数和微积分等。 二次方程式 { x } ^ { 2 } - 4 x - 5 = 0三角学 4 \sin \theta \cos \theta = 2 \sin \theta线性方程 y = 3x + 4算术 699 * 533矩阵 \left \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right \left \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right联立方程 \left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.微分 \frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }积分 \int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x限制 \lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}

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