2. f continua en [a, b]
f creciente en [a, b]

3. A=?

4. x
Vx

5. s2 = r1 + r2 S2 = R1 + R2
s2 = f (a)Vx + f (m)Vx S2 = f (m)Vx + f (b)Vx
s2 = ( f (a) + f (m))Vx S2= ( f (m) + f (b))Vx