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( = 2π) f (), [-π; π].
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( = 2) f (), [-1; 1].
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f () =│ x │, [-2; 2].
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f () =│ x │, , , , , . , , . . bn = 0.
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, [0; 2], () . .
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1. f (x) [-2; 0]
bn = 0, an
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2. f (x) [-2; 0]
a 0 = an = 0, bn.
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f (x), 4; (-2; 2)
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, a0 = an = 0.
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