Check the picture below, bear in mind that all 3 cities are colinear.
u₁₂ represents the amount of loan remaining after 12 years
<h3>How to interpret u₁₂?</h3>
The function is given as:
u₀ = 8000
Given that the subscript n in represents number of years and represents the amount left to be paid after n years.
We can conclude that:
u₁₂ represents the amount of loan remaining after 12 years
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The vertex of f(x)=-x2+4x-8 is (2, -4)