Given that \( x+y+z=15 \) when \( a, x, y, z, b \) are in A.P. and \( \frac{1}{x}+\frac{1}{y}+\f... VIDEO
Given that \( x+y+z=15 \) when \( a, x, y, z, b \) are in A.P. and \( \frac{1}{x}+\frac{1}{y}+\frac{1}{z}=\frac{5}{3} \) when \( a, x, v, z, b \) are in H.P. Then
(a) G.M. of \( a \) and \( b \) is 3
(b) one possible value of \( a+2 b \) is 11
(c) A.M. of a and \( b \) is 6
(d) greatest value of \( a-b \) is 8
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