I guessed correctly... I know what the essense of this problem is (4+1-x -> when does the result get negative - but mathematically ...??
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Plug in the values !!
A) u get 0 which is a real number
B)root2 is 1.41 ... so 2-1.41 is 0.61
root of 0.61 is < 1
so when 1 is subtracted ! it is again some numebr which is a real number
C) root 3 is 1.73 !! so u go in the same line as B) and u get a real number
D)u get 0 as the answer
E)root 5 is >2 .. so 2- root 5 is negative which is not real number
OA E
VIshu
