SAT数学题求解释In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)
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![SAT数学题求解释In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)](/uploads/image/z/1464403-67-3.jpg?t=SAT%E6%95%B0%E5%AD%A6%E9%A2%98%E6%B1%82%E8%A7%A3%E9%87%8AIn+the+xy-coordinate+plane%2C+the+graph+of+x+%3D+y%2Ay+-4+intersects+line+l+at+%280%2C+p%29+and+%285%2C+t%29.+What+is+the+greatest+possible+value+of+the+slope+of++l%3F%EF%BC%88%E6%B1%82%E5%A4%A7%E7%A5%9E%E6%95%91%E6%95%91%E6%88%91TAT%2C%E8%BF%99%E9%A2%98%E6%98%AF%E8%82%BF%E4%B9%88%E5%9B%9E%E4%BA%8B.%EF%BC%89)
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SAT数学题求解释In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)
SAT数学题求解释
In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the
greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)
SAT数学题求解释In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)
这是求斜率的最大值问题,可设此直线l的方程为y=kx+b,此直线又与曲线x=y^2-4交于(0,p)和(5,t),则可得:0=p^2-4,5=t^2-4,解得p=±2,t=±3,另外此两点在直线上,故可得:
p=b,5k+b=t,即k=(t-p)/5,故k的最大值是(3+2)/5=1
SAT数学题求解释In the xy-coordinate plane, the graph of x = y*y -4 intersects line l at (0, p) and (5, t). What is the greatest possible value of the slope of l?(求大神救救我TAT,这题是肿么回事.)
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