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koli123able
 3 years ago
The sum of four numbers in A.P is 20. The ratio of the product of the first and the last numbers and the product of 2nd & 3rd numbers is 2:3 ; Find the numbers
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ANSWER = 2,4,6,8 OR 8,6,4,2
koli123able
 3 years ago
The sum of four numbers in A.P is 20. The ratio of the product of the first and the last numbers and the product of 2nd & 3rd numbers is 2:3 ; Find the numbers . . . ANSWER = 2,4,6,8 OR 8,6,4,2

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koli123able
 3 years ago
Best ResponseYou've already chosen the best response.0Cant understand how to start

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.1Let four numbers in AP be a3d ,ad ,a+d and a+3d

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.1Now, a3d+ad+a+d+a+3d=20 4a=20 a=5

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.1Also, (a3d)(a+3d)/ {(ad) (a+d)} =2/3

koli123able
 3 years ago
Best ResponseYou've already chosen the best response.0i cant understand this sentence "The ratio of the product of the first and the last numbers and the product of 2nd & 3rd numbers is 2:3"

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.1It simply means (a3d)(a+3d)/ {(ad) (a+d)} =2/3

koli123able
 3 years ago
Best ResponseYou've already chosen the best response.0what should i do next.. cross multiply?

sauravshakya
 3 years ago
Best ResponseYou've already chosen the best response.1Now, 3(a3d)(a+3d) =2(ad)(a+d) 3a^2 27d^2 =2a^2 2d^2 a^2 =25d^2 Also a=5 5^2 =25d^2 d^2=1 d=+1

koli123able
 3 years ago
Best ResponseYou've already chosen the best response.0i have to substitute the values of a and d in the four numbers which were a3d, and so on

koli123able
 3 years ago
Best ResponseYou've already chosen the best response.0ok got the numbers :)
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