Answers

2015-02-03T20:47:33+08:00
F(2x)= 3-x
f(20)=3-20
F(20)= -17
0
2015-02-03T21:03:37+08:00
F(10)= 3-10 = -7
 *from the definition of function, since we have given x= 10 the substitute in an equation 3-x .
0