Respostas

  • Usuário do Brainly
2013-10-07T23:28:54-03:00
D) 5x'' - 3x = 0
x (5x - 3 ) = 0
x = 0
5x - 3 = 0
5x = 3
x = 3/5

e) x'' + x = 0
x (x + 1) = 0
x = 0 e
x + 1 = 0
x = - 1

f) x'' - 64 = 0
x'' = 64
x = raiz 64
x = 8