math 2 7

c 1 C 2 a b a b c 1 2 3 4 x y 3 7 a b a a b x x x 3 0 x 0 x V F U x 0 a U F U 5 x 0 1 x2 01 x xC x C f x 0 1 x2 x t 0t t1 t x2 x y t u 0t t1 0u u1 tu x2 y3 01 f 01 f x 2 f x 2 x y x 4 f i 0 100 x i x x 9 x x 9 x 10