I simply worked f(7-x) out and got the answer exactly described in (d). And x ≠ 19/3 and 0 ≤ x ≤ 7 seem appropriate too.
Now I wonder if there is any tricky thing in other areas. Would any fellow please take a look when you have time.
I simply worked f(7-x) out and got the answer exactly described in (d). And x ≠ 19/3 and 0 ≤ x ≤ 7 seem appropriate too.
Now I wonder if there is any tricky thing in other areas. Would any fellow please take a look when you have time.
Since $\displaystyle f(x)= \frac{-2x^2+1}{3x-2)^2}$, $\displaystyle f(7- x)= \frac{-2(7-x)^2+ 1}{3(7-x)-2)^2}= \frac{-2(49- 14x+ x^2)+ 1}{21- 3x- 2)^2}$$\displaystyle = \frac{-97+ 28x- 2x^2}{(19- 3x)^2}$. That's "d".