Consider the functions and .

MATHEMATICS · Multi-part · AP · AP Precalculus · Exponential and Logarithmic Functions · Exponential and Logarithmic Functions

Problem

Consider the functions

f_{1}(x)=2\cdot 7^{x}

and

f_{2}(x)=-2\cdot 7^{x}

. (i) Write the common domain of

f_{1}

and

f_{2}

in interval notation. (ii) State the range of

f_{1}

in interval notation. (iii) State the range of

f_{2}

in interval notation.