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Question

If αβ and γ are zeros of 6x3+3x25x+1 then find 1α+1β and 1γ.

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Solution

α+β+γ=36α+β+γ=12(α×β)+(α×γ)+(β×γ)=56(α×β×γ)=161α+1β+1γ
=(β×γα×β×γ)+(α×γα×β×γ)+(α×βα×β×γ),=[{α×β}+{α×γ}+{β×γ}{α×β×γ}]
putting values
=(56)(16)=5616=5×61×6=51=51α+1β+1γ=5

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