1.

Let ABC be a given triangle. Points D and E are on sides AB and AC respectively and point F is on line segment DE. Let (AD)/(AB)=x, (AE)/(AC)=y, (DF)/(DE)=z. Let area of DeltaBDF=Delta_(1), Area of DeltaCEF=Delta_(2)and area of DeltaABC=Delta. Q. (Delta_(1))/(Delta) is equal to :

Answer»

xyz
`(1-X)y(1-Z)`
`(1-x)yz`
`x(1-y)z`

ANSWER :C


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