帮忙

longcy

请帮忙！！！或提供答案也可。我连答案都没有。谢谢。

1. Function f is defined by f(x)=x^2-x for x>=0.5(a) find f  -1, and state its domain,(b) find the coordinates of the point of intersection of graph f and f  -1,(c) sketch on the same coordinates axes, the graph of f and f  -1.[2012]

2. Function f and g are defined by f(x)=x/(2x-1), x not = 0.5,g(x)=ax^2+bx+c.(a) find fof and hence, determine f  -1,(b) find the values of a, b and c if gf(x)=(3x^2+4x-1)/(2x-1)^2.[2011]

3.  Function f and gof are defined by f(x)=e^(x+2), gf(x)=x^0.5 , x>=0.(a) find g and state itsdomain,(b) determine the value of fg(e^3). [2012]

阿吉哥

看到我就疯了