已知二次函数∮(x)=x²+2-3,求∮(0),∮(1),∮(1/2)以及∮(a-1)的的值
1个回答

(1)证明:设y = 0,则x 2-MX + M-2

∵Δ=(-M)2 -4(M-2)

= M2-4M +8 =(M-2)2 4≥4> 0

∴m是否为任意实数,该二次函数的图像有两个交点的x轴;

(2)在点(3,6)到Y = X 2-MX + M-2,是

9-3M + M-2 = 6

溶液:解析米= ?

∴二次函数式是y = x 2 - (X') - (3/2)

(3),使得y = 0处,得x 2 - (X') - (3/2 )= 0

溶液:X1 = 3/2,X 2 = -1

∴AB = 5/2

∵y = x的2 - (X) - (3/2)

= 2(X-?) - (25/16)

∴C(?,-25/16)

∴S△ABC =? ×(5/2)×(25/16)

=64分之125