Given the function f (x) = x & # 178; + 2aX + 2, X ∈ [- 5,5] Use a to represent the maximum value of function f (x) in the interval [- 5,5],
f(x)=(x+a)²-a²+2
Axis of symmetry x = - A, opening upward
-The midpoint of 5 and 5 is 0
therefore
-a>=5
Namely
a
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