Q. One of these six people has murdered one of the others. Each has made 3 statements. The murderer has made 3 errors. The victim has made zero errors. The other suspects have made one or two errors. Find out who the murderer is and who the victim is.
Catwoman says.
1) If y=x5 then dydx=5x4
2) If y=2x3+3x5, then dydx=6x+15x4
3) y=2x3, then gradient is 6 at (2, 16)
Bane says
1) If A=4πr2, then dAdr=8πr
2) If A=4x10 then dydx=40x10
3) If A=7x, then dydx=7
Joker says
1) If y=x5, then dydx=5x5
2) If y=√x, then dydx=12x
3) If y=2x2, then the gradient is 6 at (3, 18)
Poison Ivy says
1) If A=4πr2, then dAdr=8r
2) If A=4x10 then dydx=40x11
3) If y=7x+2, then dydx=7
The Scare crow says
If y=3x11, then dydx=33x10
If y=3x2+6x+6, then dydx=6x+6
The gradient of x2+3x+3 is 9 when x=3
Harley Quinn say
The gradient of y=x3+x2+3x is 10 when x=2
If y=2x3, then gradient is 24 at (2, 16)
If y=2x2, then gradient is 12 at (3, 18)
