If a(1), a(2), a(3),…..a(n) are in A.P w...

If `a_(1), a_(2), a_(3),…..a_(n)` are in A.P where `a_(i) gt 0, AA`I then `(1)/(sqrt(a_(1)) + sqrt(a_(2))) + (1)/(sqrt(a_(2)) + sqrt(a_(3)))+ …+ (1)/(sqrt(a_(n-1)) + sqrt(a_(n))) = (k)/(sqrt(a_(1)) + sqrt(a_(n)))` then k=

`1-n`

`n-1`

`n+1`

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