Question

A jet of water 50 mm in diameter moving with a velocity of 15 metre per second on a series of vanes moving with a velocity of 5 metre per second find a force exerted by Jet work done by Jet si efficiency of jet

Answer 1

Explanation:

Here, p(x) is divided by (x + 2)

\sf{p(-2) = r}p(−2)=r

\to \sf{ (-2 {)}^{3} - a(-2 {)}^{2} + b(-2) + 3 = -19}→(−2)

3

−a(−2)

2

+b(−2)+3=−19

\to \sf{-8 - 4a - 2b + 3 = -19 }→−8−4a−2b+3=−19

\to \bf \red{7 = 2a + b}→7=2a+b

Hence Simplified!

\Large \mathfrak \green{Case \:2 :}Case2:

Here, p(x) is divided by (x - 2)

\sf{ p(2) = 17 }p(2)=17

\to \sf{ (2 {)}^{3} - a(2 {)}^{2} + b(2) + 3 = 17}→(2)

3

−a(2)

2

+b(2)+3=17

\to \sf{ 8 - 4a + 2b + 3 = 17}→8−4a+2b+3=17

\to \bf \red{ b - 2a = 3}→b−2a=3