one-to-one function g and h are defined as follows.g={(-6,5)

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one-to-one function g and h are defined as follows.g={(-6,5),(0,6)(2,0),(3,-7)} h(x)=8x+3
find the following1.g^-1(0)=
2.h^-1(x)=
3.(h.h^-1)(-5)=

g(x)={(-6,5),(0,6)(2,0),(3,-7)}
g^-1(x)={(5,-6),(6,0)(0,2),(-7,3)}
g^-1(0)=2
y=8x+3
x=(y-3)/8
h^-1(x)=(x-3)/8
h.h^-1这个表示什么h(x)*h^-1(x)吗?
(h.h^-1)(-5)=[8*(-5)+3]*[(-5-3)/8]=37
再问：顺便问一下，－140度的角的参考角是多少啊
再答： -140+360=220是这样吗，参考角什么概念真没学过

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