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CPT 1418 views 6 replies

The three number are in G.P these product  are 729 and sum of these square is 819. find these three numbers...

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nos are 3  9  and 27

3 *  9 *  27 = 729

(3)^2 + (9)^2 + (27)^2  =  819 

please explain how u can solve this..

please explain how u can solve this..

Look.. 729 is a muliple of 3. And if you know GP you can easily arrive at the answer.

3, 3'2, 3'3.....

3*9*27= 729.  and

the sum of the squares of 3. 9, 27

3'2+9'2+27'2=819..

Hope you understood..!

take the 3 nos as a/b, a & ab

so a/b*a*ab=729

so a^3 = 729

so a=9

if you have this you can guess the rest of the nos.


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