Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.

A.  < 
B.  < 1.23 × 10-2
C.  < 1.37 × 10-3
D.  < 4.12 × 10-3


Answer: D

Mathematics

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Find the missing complex number. = 7 + 4i

A. 4 + 58i B. 52 + 26i C. 4 - 58i D. 24i2 + 58i + 28

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Solve by the substitution method. x + y = 89x + 9y = 72

A. {(7, 1)} B. {(0, 0)} C. {(x, y)| x + y = 8} D. ?

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For the figure, determine whether each statement is true or false. If a statement is true, explain why.




(a) ?1 = 90°.
(b) ?1 = ?5 + ?11.
(c) ?9 + ?10 = ?2(?5).
(d) ?5 + ?6 = ?1.

Mathematics

Use the substitution formula to evaluate the integral.

A. -42 ln 3 B. -21 ln 3 C. 42 ln 3 D. 21 ln 3

Mathematics