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To convert temperature in degrees Celsius (C) to degrees Fahrenheit (F), one can use the formula $$F=9/5 C+32$$. If the value of $$2C+28$$ is used as an approximation of the value of $$F$$ when $$C=30$$, then the value of the approximation will be how many degrees Fahrenheit greater or less than the value of $$F$$?
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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。
