Question: In Exercises 5 and 6, find the best quadratic approximation to f on the interval [- 1, l]. 1. f(x) = |x| 2. f(x) =

In Exercises 5 and 6, find the best quadratic approximation to f on the interval [- 1, l].
1. f(x) = |x|
2. f(x) = cos (π x/2)

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