Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Let
f
a
(
x
)
=
a
⋅
2
x
f_{a}(x)=a\cdot 2^{x}
f
a
(
x
)
=
a
⋅
2
x
, where
a
≠
0
a\neq 0
a
=
0
. a. (i) Express the range of
f
a
f_{a}
f
a
in terms of the sign of
a
a
a
. b. (ii) Hence, write the range when
a
=
−
4
a=-4
a
=
−
4
.
Browse the problem library