- #1
tomboi03
- 77
- 0
For x E [tex]\Re[/tex], let
f(x) = 1 + [tex]\int[/tex]et2 dt
(the interval for this function goes from (0,x) i just didn't know how to put it on the integral.)
i. Prove that the range of f is [tex]\Re[/tex] (i.e. prove that for every y E [tex]\Re[/tex] there is an x E [tex]\Re[/tex] such that f(x)=y)
ii. Prove that f: [tex]\Re[/tex] [tex]\rightarrow[/tex][tex]\Re[/tex] is invertible
iii. Denote the inverse of f by g. Argue that g is differentiable and show that g satisfies the equation
g'(y) = e-(g(y))2
for all y E [tex]\Re[/tex]. Show that g is differentiable twice.
iv. Determine g(1), g'(1), g"(1).
okay, so for i, i have no idea
ii, how can you prove that a function is invertible
iii, i have no idea
iv, i just find the first derivative and the 2nd derivative and find the values of all of that.
Please help me out,
Thank You
f(x) = 1 + [tex]\int[/tex]et2 dt
(the interval for this function goes from (0,x) i just didn't know how to put it on the integral.)
i. Prove that the range of f is [tex]\Re[/tex] (i.e. prove that for every y E [tex]\Re[/tex] there is an x E [tex]\Re[/tex] such that f(x)=y)
ii. Prove that f: [tex]\Re[/tex] [tex]\rightarrow[/tex][tex]\Re[/tex] is invertible
iii. Denote the inverse of f by g. Argue that g is differentiable and show that g satisfies the equation
g'(y) = e-(g(y))2
for all y E [tex]\Re[/tex]. Show that g is differentiable twice.
iv. Determine g(1), g'(1), g"(1).
okay, so for i, i have no idea
ii, how can you prove that a function is invertible
iii, i have no idea
iv, i just find the first derivative and the 2nd derivative and find the values of all of that.
Please help me out,
Thank You