Question 989583
y = 10/x^5
y = 10x^(-5)


Apply the derivative. Use the <a href = "http://tuckandtatumsapcalcbook.wikispaces.com/file/view/power_rule.JPG/208875874/power_rule.JPG">power rule</a>


dy/dx = -5*10*x^(-5-1)
dy/dx = -50*x^(-6)
dy/dx = -50/(x^6)


So we see that A = -50 and B = 6