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Mathematics
Problem
Consider the functions
f
1
(
x
)
=
2
⋅
7
x
f_{1}(x)=2\cdot 7^{x}
f
1
(
x
)
=
2
⋅
7
x
and
f
2
(
x
)
=
−
2
⋅
7
x
f_{2}(x)=-2\cdot 7^{x}
f
2
(
x
)
=
−
2
⋅
7
x
. a. (i) Write the common domain of
f
1
f_{1}
f
1
and
f
2
f_{2}
f
2
in interval notation. b. (ii) State the range of
f
1
f_{1}
f
1
in interval notation. c. (iii) State the range of
f
2
f_{2}
f
2
in interval notation.
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