Question

if a + b + c= 0
prove that
$\frac{ {a}^{2} }{bc} + \frac{ {b}^{2} }{ca} + \frac{ {c}^{2} }{ab} = 3$

Answer 1

if a+b+c = 0, then
a^3+b^3+c^3 = 3abc
a^3/abc + b^3/abc + c^3/abc = 3
a^2/bc + b^2/ac + c^2/ab = 3 (hence proved)

Answer 2

Answer:

Step-by-step explanation:Area of cross section of river= 2 x 45 = 90 m²

so, water flowing into the sea= area of cross section x rate of flowing water

= 90 x 3000

= 270000 m³

there water flowing per minute= 270000 / 60 = 4500 m³