Report - CLASS – XII 2019 – 20 - WordPress.com · 6 4 x fof x f f x f x 4 3 4 3 6 4 16 12 18 12 34 4 3 24 18 24 16 34 6 4 6 4 x x x x x x x x x x Therefore (fof)(x) = x, for all 2 3 x

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