Find the values of a,b ,如果y=2x+a是y=4-bx的反函数,那么a,b 的值分别为——,——

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Findthevaluesofa,b,如果y=2x+a是y=4-bx的反函数,那么a,b的值分别为——,——Findthevaluesofa,b,如果y=2x+a是y=4-bx的反函数,那么a,b的值

Find the values of a,b ,如果y=2x+a是y=4-bx的反函数,那么a,b 的值分别为——,——
Find the values of a,b ,如果y=2x+a是y=4-bx的反函数,那么a,b 的值分别为——,——

Find the values of a,b ,如果y=2x+a是y=4-bx的反函数,那么a,b 的值分别为——,——
求反函数,直接把x换成y,y换成x,再化简就可以了
y=2x+a
x=2y+a
y=1/2x -(1/2)a
对应y=4-bx
待定系数法,对应项相等:
1/2=-b,b=-1/2 ,(-1/2)a=4 ,a=-8

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