Find the least common denominator.
, 
A. -2(x - 2)(x - 4)
B. -2(x + 2)(x + 4)
C. -2(x + 2)(x - 4)
D. -2(x - 2)(x + 4)
Answer: D
Mathematics
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Use a reciprocal identity to find the indicated trigonometric function of ?.cos ? if sec ? = - 
A. - 
B. - 
C. 
D. 
Mathematics
Write the expression as a pure imaginary number.
A. -2
i
B. -2
C. 2
i
D. 2
Mathematics
Write a monomial that represents the described quantity.The circumference of a circle with radius r
A. 2r B. ?r2 C. ?r D. 2?r
Mathematics
The sequence is defined recursively. Write the first four terms.a1 = 2, a2 = 5 and an = an-2 - 3an-1 for n ? 3
A. 2, 5, -1, -16 B. 2, 5, 1, 2 C. 2, 5, 17, -46 D. 2, 5, -13, 44
Mathematics