A function is defined by , where , and are constants. The graph of passes through the points and . The point lies on the graph of . Find the values of , and .
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Worked solution
1
1. Form equations using the points given on the graph of $y = \text{f}(x)$.
Since lies on , we have :
Since lies on , we have :
2. Form an equation from the point on the translated graph $y = \text{f}(x + 1)$.
Since lies on the graph of , we substitute and into the equation:
3. Solve the system of linear equations to find $a$, $b$, and $c$.
Subtracting (1) from (2):
Substituting into (1) and (3):
Subtracting (4) from (5):
Substituting into (4):
(Note: The system of equations can also be solved directly using the system solver function on a graphing calculator.)
, ,
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