If xi>0 i=1,2,3,...50 x1+x2...+x50=50 th...

If `x_i>0` i=1,2,3,...50 `x_1+x_2...+x_50=50` then the minimum value of `1/(x_1) +1/(x_2) +...+1/(x_50)` equals

`(50)^(2)`

`(50)^(3)`

`(50)^(4)`

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