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Find the complete range of values of x for which (x27x+13)x<1.


Options:
A .   (,+)
B .   (0,)
C .   (,4)
D .   (,0)(3,4)
Answer: Option D
:
D

Check for values which are included in the range in 2 options and not there in two options i.e. substitute x=0, equation is not satisfied at x=0; thus option (a) and option (c) can be eliminated next, check for values which are there in option (b) and not there in option (d) or vice versa. Put x=1The equation is not satisfied at x=1, LHS= 6 and RHS=1. Thus the correct range is option (d)



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