神马作文网一道英文函数数学题,要求写出自变量,因变量,定义域,值域
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一道英文函数数学题,要求写出自变量,因变量,定义域,值域
Mr.Davidson works out at the local gym.The doctor told him to monitor his heart rate during his workout.When he begins his workout,his resting heart rate is 70 beats per minute.The doctor told him that his heart rate,during his workout,should never exceed 190% of his resting heart rate.Identify the independent and dependent values.If he works out for 45 minutes,what is a reasonable domain and range for this situation?
Mr.Davidson works out at the local gym.The doctor told him to monitor his heart rate during his workout.When he begins his workout,his resting heart rate is 70 beats per minute.The doctor told him that his heart rate,during his workout,should never exceed 190% of his resting heart rate.Identify the independent and dependent values.If he works out for 45 minutes,what is a reasonable domain and range for this situation?
医生让Davidson监测他健身时的心率,所以自变量是健身的时间,因变量是健身中的心率.
定义域是健身的时间长短范围,就是（0,45）分钟
值域就是心率的变化范围,是（70,70*190%）=（70,133）跳每分钟
定义域是健身的时间长短范围,就是（0,45）分钟
值域就是心率的变化范围,是（70,70*190%）=（70,133）跳每分钟
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