Respuesta :

Answer:

(1/2) (r⁹+10)^(-1/2) ×9r⁸

Step-by-step explanation:

w(r) = √r⁹+10 = (r⁹+10)^(1/2)

(dw/dr) = (1/2) (r⁹+10)^(-1/2) ×9r⁸