i nned to know how to differentiate this;
i have dy/dx= -9x^-4+8x+1
would this be correct or would i not keep the +1 on the end?
basically what i did was:
3x^-3=-9x^-4, times the 3 and -3 together and take away one power
same with 4 and 2, times them to get 8 and take away one power to get 8x.
so now i have dy/dx= -9x^-4+8x but i don't know if i keep the +1 or not?
Maybe you should talk with your teacher about this and take soms lessons, because I think it's really difficult to explain everything about calculating derivatives via the pc.
What have you learned yet at school about derivatives? ...