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The electric power P in a resistor is directly proportional to the square of the electric current I flowing through the resistor. For a given resistor, if the power is 18 watts when the current is 3 amperes, what is the power, in watts, when the current is 4 amperes?
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· 相关考点
3.6.1 函数的定义
3.6.1 函数的定义
以上解析由 考满分老师提供。
