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复合函数的极限:乘积和商

问题

函数 gf 已绘制。
limit, start subscript, x, \to, 3, end subscript, start fraction, g, left parenthesis, x, right parenthesis, divided by, f, left parenthesis, x, right parenthesis, end fraction.
选出正确答案:
选出正确答案:
不会做了?
不会做了?