Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Which one of the following correctly defines
(
f
+
g
)
(
x
)
(f+g)(x)
(
f
+
g
)
(
x
)
for two real-valued functions
f
f
f
and
g
g
g
? a)
(
f
+
g
)
(
x
)
=
f
(
x
)
g
(
x
)
(f+g)(x)=f(x)\,g(x)
(
f
+
g
)
(
x
)
=
f
(
x
)
g
(
x
)
b)
(
f
+
g
)
(
x
)
=
f
(
x
)
+
g
(
x
)
(f+g)(x)=f(x)+g(x)
(
f
+
g
)
(
x
)
=
f
(
x
)
+
g
(
x
)
c)
(
f
+
g
)
(
x
)
=
f
(
g
(
x
)
)
(f+g)(x)=f\bigl(g(x)\bigr)
(
f
+
g
)
(
x
)
=
f
(
g
(
x
)
)
d)
(
f
+
g
)
(
x
)
=
f
(
x
)
−
g
(
x
)
(f+g)(x)=f(x)-g(x)
(
f
+
g
)
(
x
)
=
f
(
x
)
−
g
(
x
)
Browse the problem library