1. If a,b,c are in A.P and X,Y,Z are in G.P then prove( Xb-c)x (Yc-a) x(Za-b)=1
  2. In a G.P tp+q=m and tp-q=n. Then find tp.

The question should be; 

​​​​​​If a,b,c are in A.P and X,Y,Z are in G.P then prove( Xb-c)x (Yc-a) x(Za-b)=1

given: a , b and c are in AP. therefore

or

X , Y and Z are in GP, therefore

LHS of the given equation:

which is the required result.

hope this helps you.

cheers!!

  • 29

the answer is for the second question!!

  • -4

 (mn)1/2

  • -4
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