if a1,a2,a3,............an are +ve real numbers whose product is a fixed number \"c\",then min. value of a1+a2+.........an-1+2an=?

Dear ajinkya

given.

 a₁.a₂.a_3.............a_{n =}c

so use AM≥GM

(a₁+a₂+.........a_n-1+2a_n)/n   ≥ ( 2a₁.a₂.a_3.............a_n)^1/n

                             ≥ ( 2c)^1/n

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