1.

If a_1 , a_2 , a_3, …."" a_n are in A.P. where a_i gt 0 for all i , then the value of(1)/(sqrt(a_1) + sqrt(a_2)) + (1)/(sqrt(a_2) + sqrt(a_3)) + … + (1)/(sqrt(a_(n-1)) + sqrt(a_n)) :

Answer»

`(N-1)/(sqrta_1+sqrta_2)`
`(n+1)/(sqrta_1+sqrta_2)`
`n/(sqrta_1-sqrta_2)`
none

Answer :A


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