1.

Iff:R to N UU {0}where f (area of triangle joining points P( 0,5) , Q( 8,4)and R(x,y ) such that angle PRQis a right angle) = number of triangle , then which of the following is true?

Answer»

`F(5)=4`
`f(7)-0`
`f(6.25)=2`
`f(x)` is into

Answer :A::B::C::D


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