Find the value of the expression.
A. 
B. 
C. 4
D. 
Answer: D
Mathematics
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Find the interval of convergence of the series.
A. -? < x < ? B. 0 ? x < 2 C. x < 2 D. 0 < x < 2
Mathematics
Find the derivative of the function.y = -3tan x - 13csc x
A. 3sec2 x + 13csc x cot x B. -3sec2 x + 13csc x cot x C. 3sec2 x - 13csc x cot x D. -3sec2 x - 13csc x cot x
Mathematics
Perform the indicated operations.(x2 + 1) - (9x2 - 9) + (x2 + x + 3)
A. -7x2 + x + 13 B. -9x2 + x + 13 C. -7x2 - 8x + 4 D. -8x2 + x + 13
Mathematics
Write the expression in the standard form a + bi.If z = 7 - 3i, evaluate z + 
.
A. 14 - 6i B. 14 + 6i C. 14 D. -6i
Mathematics