What is the [tex]\( y \)[/tex]-intercept of [tex]\( f(x)=\left(\frac{1}{2}\right)^x \)[/tex] ?

A. [tex]\( \left(1, \frac{1}{2}\right) \)[/tex]
B. [tex]\( (1,0) \)[/tex]
C. [tex]\( (0,1) \)[/tex]
D. [tex]\( (0,0) \)[/tex]



Answer :

To find the [tex]$y$[/tex]-intercept of the function [tex]\( f(x) = \left( \frac{1}{2} \right)^x \)[/tex], you need to determine the point where the graph of the function crosses the [tex]$y$[/tex]-axis. This happens when [tex]\( x = 0 \)[/tex].

1. Substitute [tex]\( x = 0 \)[/tex] into the function [tex]\( f(x) = \left( \frac{1}{2} \right)^x \)[/tex]:
[tex]\[ f(0) = \left( \frac{1}{2} \right)^0 \][/tex]

2. Recall that any non-zero number raised to the power of 0 is equal to 1:
[tex]\[ \left( \frac{1}{2} \right)^0 = 1 \][/tex]

3. Therefore, [tex]\( f(0) = 1 \)[/tex], so the [tex]$y$[/tex]-intercept is at the point where [tex]\( x = 0 \)[/tex] and [tex]\( y = 1 \)[/tex]. This point is written as:
[tex]\[ (0, 1) \][/tex]

Hence, the [tex]$y$[/tex]-intercept of the function [tex]\( f(x) = \left( \frac{1}{2} \right)^x \)[/tex] is [tex]\(\boxed{(0, 1)}\)[/tex].

The correct answer is:
C. [tex]\((0, 1)\)[/tex]

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