exam Maths Puzzle Numerical Ability

I kind of understand how to do these fog and gof problems, but I dont know how to do this one because of the square root. Please help me!!! Thank you!!!! The problem is:
For {{{ f

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exam Other Question
Q. Let f(x)=(x-1)^3 (x+2)^4(x-3)^5(x-6)divided by X^2(x-7)^3


Solve the following inequality
I) f(x)>0
II) f(x)> or =o
III) f(x)<0
IV) f(x)< HOW DO i SOLVE THIS PROBLEM ? (7XA)x3=7x)2x3)