If ((t^2)-1)/(t-1)=2, then what value(s) may t have?

A) 1 only
B) -1 only
C) 1 or -1
D) no values
E) an infimite number of values

Which of the following is a factor of the expression ((2x)^2)+1 ?

A) x+2
B) x-2
C) x+sqrt2
D) x-sqrt2
E) None of these

If a^x=b^y, where a, b, x, and y are positive integers, is x divisible by y?

(1) a is an odd number
(2) y is an odd number

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If 9 is a factor of 2x, then w=which of the following may not be an integer?

A. 6x/54 + 2x/3
B. (4x-18)/9
C. (2x+27)/9
D. (81 – 4x^2)/2
E. (2x – 3)/3