Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Which expression gives the area
A
(
x
)
A(x)
A
(
x
)
of a square cross section whose side length at position
x
x
x
equals the vertical distance between the curves
y
=
f
(
x
)
y=f(x)
y
=
f
(
x
)
(upper) and
y
=
g
(
x
)
y=g(x)
y
=
g
(
x
)
(lower)? a)
π
(
f
(
x
)
−
g
(
x
)
)
2
\pi\,(f(x)-g(x))^2
π
(
f
(
x
)
−
g
(
x
)
)
2
b)
f
(
x
)
2
−
g
(
x
)
2
f(x)^2-g(x)^2
f
(
x
)
2
−
g
(
x
)
2
c)
(
f
(
x
)
−
g
(
x
)
)
2
(f(x)-g(x))^2
(
f
(
x
)
−
g
(
x
)
)
2
d)
(
f
(
x
)
−
g
(
x
)
)
(f(x)-g(x))
(
f
(
x
)
−
g
(
x
))
Browse the problem library