y = f (x) (a, b) f (x) . y = f (x) (a < x < b) M0 (x0, y0) M(x, y) ,(1) x , y = f (x)

(2) M0M s M0M s x (a, b) M(x, y) s s x .s = s(x)(2).

x x + dx M MT dy s MT x s = s(x) sdy

dx = (t) dtdy = f (t)dt

K 1 AB a s

2 B L A ((a)) AB L A K

s = R a R AB OA OB

y = f (x) . y = tan = arctan y

1 y = x3 (0, 0)(-1, -1).y = 3x2 y = 6x x = 0 M(0, 0) K(0) = 0. x = -1 M(-1, -1)

2(a > 0) t = .x = a(1 - cos t)x = a sin ty = a sin ty = a cos t.

t =

y = f (x) M (x, y) K 0 M (x, y) R y = f (x) M MC R C M .

C R M ()..

3 y = 0.4x2. . .

y = 0.8x y = 0.8 x = 0 K = 0.8. 1.25 2.50 .

s s