①原式=1/2(X方+12X+20)
=1/2(X方+12X+36-36+20)
=1/2(X方+12X+36)-8
=1/2(X+6)方-8
所以原式先向右平移6个单位,再向上平移8个单位,才能得到函数y=1/2x方的图像.
②y=-x方+2x+3
=-(X方-2X-3)
=-(X方-2X+1-1-3)
=-(X-1)方+4
原函数的图象为y=-(X-4)方+2=-X方+8X-14 题出错了吧~bX不能有方~
所以a=-1,b=8,c=-14
①原式=1/2(X方+12X+20)
=1/2(X方+12X+36-36+20)
=1/2(X方+12X+36)-8
=1/2(X+6)方-8
所以原式先向右平移6个单位,再向上平移8个单位,才能得到函数y=1/2x方的图像.
②y=-x方+2x+3
=-(X方-2X-3)
=-(X方-2X+1-1-3)
=-(X-1)方+4
原函数的图象为y=-(X-4)方+2=-X方+8X-14 题出错了吧~bX不能有方~
所以a=-1,b=8,c=-14