7 p 5,10062 7 f p æö » ç÷ èø 7 p 32 f(x ) 11x 101x 1001x 10001=- + - 22 1 f (x) sin(x x 1) cos(x x 1)=+ + 22 2 f (x) sin( x x 1) cos( x x 1)=+ ++ 22 3 f(x) sin(x x 1) cos(x x 1)= ++ 2 sin x f(x) xx1 = -+ 12 12 0,52473 1, 05550 0,74145 0,48761 xx yy »»- ìì íí »»- îî 43 ,18 3 ab==- PJ PR 0,930604859 PJ PR » 0,707106781 PJ PR » 22 xy 1 49 -= Bài