- #1
physicszman
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Hi, these are just a few problems from my assignment I am having a hard time with. Any help is appreciated.
1) consider function f(x) = 1/3X^3 - 1/2^2 - 6x + 4
a) find the points on the graph at which the tangent lines are horizontal.
b) find the slope of the line tangent to the curve at x = 3
f) write an equation of this tangent line
2) After t years the population P is given by P(t) = 2000t^2 + 10000t
what is the growth rate at t = 10?
Find the derivative: (I put my answers, please doublecheck, thanks)
a) f(x) = 1/2x^1/2 + 2/3x^1/4 - x^1/5
f'(x) = 1/4x^-1/2 + 1/6x^-3/4 - 1/5x^-4/5
b) y = 5x^1/3
y'= 5/3x^-2/3
c) g(x) = x^1/3 - x^1/3
g'(x) = 1/3x^-2/3 - 1/3x^-2/3
d) y = x^-3/4 - 3x^2/3
y'= -3/4x^-7/4 - 2x^-1/3
e) h(x) = x/2 + 2/x
h'(x) = ?
f) y = (3x^2 - 5x +7)/4
y'= ?
g)f(x) = -1/3x^3 + 4x^2 - 5x + 6
f'(x)= -x^2 + 8x - 5
h) g(x) = (x^3 + x^5)/(x^2)
g'(x) = ?
Thanks again!
1) consider function f(x) = 1/3X^3 - 1/2^2 - 6x + 4
a) find the points on the graph at which the tangent lines are horizontal.
b) find the slope of the line tangent to the curve at x = 3
f) write an equation of this tangent line
2) After t years the population P is given by P(t) = 2000t^2 + 10000t
what is the growth rate at t = 10?
Find the derivative: (I put my answers, please doublecheck, thanks)
a) f(x) = 1/2x^1/2 + 2/3x^1/4 - x^1/5
f'(x) = 1/4x^-1/2 + 1/6x^-3/4 - 1/5x^-4/5
b) y = 5x^1/3
y'= 5/3x^-2/3
c) g(x) = x^1/3 - x^1/3
g'(x) = 1/3x^-2/3 - 1/3x^-2/3
d) y = x^-3/4 - 3x^2/3
y'= -3/4x^-7/4 - 2x^-1/3
e) h(x) = x/2 + 2/x
h'(x) = ?
f) y = (3x^2 - 5x +7)/4
y'= ?
g)f(x) = -1/3x^3 + 4x^2 - 5x + 6
f'(x)= -x^2 + 8x - 5
h) g(x) = (x^3 + x^5)/(x^2)
g'(x) = ?
Thanks again!