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Find y.
y''(v) = 3v - 8/v^2 + 1 , y'(2) = 0 , y(-1) = 2


Sagot :

Answer:

y(v) = [tex]8\ln |v| + \frac{v^{3} }{2} + \frac{ v^{2}}{2} - 12v[/tex] - 10

Step-by-step explanation:

y''(v) =[tex]3v - \frac{8}{v^{2} } + 1[/tex]

y'(v) =  [tex]\frac{3v^{2} }{2} + v + \frac{8}{v}[/tex] + C

y'(2) = [tex]\frac{3(2)^{2} }{2} } + 2 + \frac{8}{2}[/tex] + C = 6 + 2 + 4 + C = 12 + C = 0

                                              C = -12

So, y'(v) = [tex]\frac{3v^{2} }{2} + v + \frac{8}{v}[/tex] -12

Now,  y(v) =  [tex]8\ln |v| + \frac{v^{3} }{2} + \frac{ v^{2}}{2} - 12v[/tex] + D

Now, y(-1) = [tex]8\ln |-1| + \frac{(-1)^{3} }{2} + \frac{(-1)^{2} }{2} - 12(-1)[/tex] + D = 2

                   [tex]0 + \frac{-1}{2} + \frac{1}{2} +12[/tex] + D = 2

                                         12 + D = 2

                                                D = -10

Wow!  Now y(v) = [tex]8\ln |v| + \frac{v^{3} }{2} + \frac{ v^{2}}{2} - 12v[/tex] - 10

I spent a long time typing this, so I hope it is correct for you.

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