linshweyioo1644 linshweyioo1644
  • 29-03-2024
  • Mathematics
contestada

If the mean of a, b, c is M and ab + bc + ca = 0, then the mean of a², b², c² is:
A. 9M 2
B. 6M 2
C. M 2
D. 3M 2

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