If the arithmetic mean of a,b,c, is M/3 and 1/a+1/b=1/c, then the arithmetic mean of a2,b2,c2 is ?
A. 6M^2
B. 9M^2
C. M^2/3
D. 3M^2
Answer:C
If the arithmetic mean of a,b,c, is M/3 and 1/a+1/b=1/c, then the arithmetic mean of a2,b2,c2 is ?
A. 6M^2 B. 9M^2 C. M^2/3 D. 3M^2