SOLUTION: Given the function f(x)=8-x^3, x>_0 (line goes under >)
a) Sketch the graph of f (use a solid line, label f(x)
b) Use the graph of f above and sketch the graph of f^-1 on the sam
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Question 1190910: Given the function f(x)=8-x^3, x>_0 (line goes under >)
a) Sketch the graph of f (use a solid line, label f(x)
b) Use the graph of f above and sketch the graph of f^-1 on the same axis as in part a) of this problem (use a dashed line, label the inverse). How did you find the points to sketch the inverse function?
c) Find f^-1(x)
Found 2 solutions by MathLover1, Boreal:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
,
a.
b.
note: orange line should be dashed line
c.
inverse of , will be:
....swap variables
,
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
f(x)=8-x^3
inverse
x=8-y^3
y^3=8-x
y=(8-x)^(1/3)
To find the points for the inverse, (8, 0) is one, and (0, 2) is the other. The two are equal when
8-x^3=(8-x)^(1/3)
One way is to graph both and find where they intersect, which is at x=1.834.
One can put in points for x and take the cube root.
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