If f(x) = x3, which of the following describes the graph of f(x + 2)?
The graph of f(x + 2) is a horizontal shift of f(x) = x3 two units to the left.
The graph of f(x + 2) is a horizontal shift of f(x) = x3 two units to the right.
The graph of f(x + 2) is a vertical shift of f(x) = x3 two units up.
The graph of f(x + 2) is a vertical shift of f(x) = x3 two units down.
Solution:
Given, function f(x) = x3
We have to find the graph that describes the graph of f(x + 2).
Let us understand the transformation of f(x) to f(x+3) and the transformation of f(x) to f(x+2).
The above graph describes the graph of f(x - 3) if f(x) = x3.
The red line indicates graph of f(x)
The blue line indicates graph of f(x - 3)
It is clear that the graph of f(x - 3) is shifted horizontally to three units to the right from the graph of f(x).
The red line indicates graph of f(x)
The blue line indicates graph of f(x + 2)
So, the graph of f(x + 2) is shifted horizontally to two units to the left from the graph of f(x).
Therefore, the graph of f(x + 2) is a horizontal shift of f(x) = x3 two units to the left.
If f(x) = x3, which of the following describes the graph of f(x + 2)?
Summary:
If f(x) = x3, the graph of f(x + 2) is a horizontal shift of f(x) = x3 two units to the left.
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