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(i) The value of x + y + z is 15. If a, ...

(i) The value of `x + y + z` is 15. If a, x, y, z, b are in AP while the value of `(1)/(x) + (1)/(y) + (1)/(z) " is " (5)/(3)`. If a, x, y, z b are in HP, then find a and b
(ii) If x,y,z are in HP, then show that
log `(x +z) + log (x +z -2y) = 2 log ( x -z)`.

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