anonymous
  • anonymous
Let y= 3 t^5 - 3. Find D, E, and F so that (d^2 y)/(d t^2) = Dt^E +F
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
D=60 F=0
campbell_st
  • campbell_st
Differentiate \[f'(t) = 15t^4 \] \[f"(t) = 60t^3\] D = 60, E = 3 and F = 0
anonymous
  • anonymous
what if its (dy)/(dt)|_(t = 2) =

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anonymous
  • anonymous
15*2^4
anonymous
  • anonymous
so it would be 240?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
if so how could I find the 2nd deriv? from 240
campbell_st
  • campbell_st
you can't find the 2nd derivative.... in terms of t before doing anything
anonymous
  • anonymous
so I would have to go back and plug 2 into the 2nd deriv equation?
anonymous
  • anonymous
for t
anonymous
  • anonymous
Yeah
anonymous
  • anonymous
ok thanx

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