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以下是完整 markdown: --- title: Calculus hw author: Jewel date: April 21, 2023 --- > Question 1 $$ f(x) = \begin{cases} Asin(x)+Bcos(x) & \text{if } x < 0 \\ x^2+1 & \text{if } x \geqslant 0 \end{cases} $$ For $f(x)$ to be continuous at $x=0$ , $RHL = LHL = f(0)$ $RHL ...