I need help on these questions..... notice on how I am very careful on my grouping so you don't get confused on the order of operations.....
1) If f(y) = (2-y) / (2+y), find [f(y + k) - f(y)] / k
This is my answer...... [(2-y-k) / (2k+yk+k^2)] + [(-2+y) / (2k+yk)]
The problem is that my answer seems wrong......the equation seems too long to be correct....can it be simplified even more or is my answer correct?
2) Simplify by factoring
2(x+4) [(2x-1)^ -3] + 6[(x+4)^ -2](2x-1)^2
I could have solved this one if it wasn't for the negative exponents...
3) Also, can someone explain this question for me......
Which (if any) of the following equations are valid for all theta?
a) sin(theta + 2pi) = sin theta
b)cos(- theta) = cos theta
c) sin(pi + theta) = - sin theta
All of those are correct by the way, but I just don't understand what the question is asking. It is asking which of the equations are true?