exam
Maths Puzzle
Numerical Ability
Is sqrt of x^2 an identity (true for all values of x?) explain your answer
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exam Other Question
what are the non-permissible values of the rational expression 4xy/4x^2y^2?
a. x=0 and y=1
b. x=0 and y=0
c. x=4 and y=-1
d. x=2 and y=-2
Determine the number of ways a class of ten students can select four students for a committee.
The answer is supposed to be 210