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If a , b , c are in AP and A.G are arithmetic and geometric mean , between a and b while $\;A^{|}\;and\;G^{|}$ are A.M and G.M between B and C . then


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Answer : (b) $A^2-G^2={A^{|}}^{2}-{G^{|}}^{2}$
Explanation : $\;A^{2}=(\large\frac{a+b}{2})^2\quad\;G^2=ab$
Similarly ,
answered Jan 22, 2014 by yamini.v

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