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Grade: 10

                        

If M,N and T are in arithmetic progression,prove that [m+2n-t][2n+t-m][t+m-n]=4mnt

3 years ago

Answers : (1)

Arun
24742 Points
							
If m,n, t are in A.P.
Then
2n = m+ t
Use this in LHS
(m+2n-t)(2n+ t- m)(t+ m- n)
(m+m+t -t)(m+t+t - m)(2n -n)
2m* 2t *n
= 4mnt
= RHS
= Hence proved
3 years ago
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