1.

a_1,a_2,a_3,…., a_nfrom an A.P.Then the sum sum_(i=1)^10(a_i a_(i+1)a_(i+2))/(a_i + a_(i+2)) where a_1=1 and a_2=2 is :

Answer»

`495/3`
`495/4`
`495/2`
`495`

ANSWER :C


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