1.

If a + b + c = m and $$\frac{1}{a}$$ + $$\frac{1}{b}$$ + $$\frac{1}{c}{\text{,}}$$ then average ofa2, b2, c2 is?

A. ${m^2}$$
B. $\frac{{{m^2}}}{3}$$
C. $\frac{{{m^2}}}{9}$$
D. $\frac{{{m^2}}}{{27}}$$
Answer» C. $\frac{{{m^2}}}{9}$$


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