because when you plug in -1 for y=2x^3+24x-18 the end result is a negative not positive.
The other choices to the questions are:
b.decreasing for all values of x
c.only increasing for values of x on the interval (-infinity,-2)U(2,+infinity)
d.only increasing for values of x on the...
[SOLVED] Calculus: Derivatives Problem #2
Homework Statement
The graph of y=2x^3+24x-18 is
Homework Equations
y '=6x^2+24
y ''=12x
The Attempt at a Solution
The answer to this is "increasing for all values of x"
But I want to know why...if substituting -1 for x will make the...
Homework Statement
The first derivative of the function f is given by f '(x)= (((cos^2)x)/(x)) - 1/5
How many critical numbers does f have on the open interval (0,10)?
Homework Equations
The Attempt at a Solution
I already got this question wrong but I don't know why I got it...
Homework Statement
http://img256.imageshack.us/my.php?image=b911om5.jpg
sin30= .50 sin60= .87
cos30= .87 cos60= .50
tan30= .58 tan60= 1.73
A 5.0 kilogram monkey hangs initially at rest from two vines. A and B, as shown above. Each of the vines has length 10 meters and...
Homework Statement
Given the following variables find how far the ball will land away from the point it leaves the ramp to the point it hits the ground.
Vertical:
Delta X= 1m
Velocity Final= ?
Velocity Initial= ?
Acceleration= -10 m/s^2
t= ?
Horizontal:
Delta X= ? <- Objective...