B In Problems 15 and 16 , explain which of ( A ), ( B ), and ( C ) are equal before evaluating the expressions. Then evaluate each expression to two decimal places. 16. (A) ∫ 0 10 2 , 000 e 0.05 t e 0.12 ( 10 − t ) d t (B) 2 , 000 e 1.2 ∫ 0 10 e − 0.07 t d t (C) 2 , 000 e 0.05 ∫ 0 10 e 0.12 ( 10 − t ) d t
B In Problems 15 and 16 , explain which of ( A ), ( B ), and ( C ) are equal before evaluating the expressions. Then evaluate each expression to two decimal places. 16. (A) ∫ 0 10 2 , 000 e 0.05 t e 0.12 ( 10 − t ) d t (B) 2 , 000 e 1.2 ∫ 0 10 e − 0.07 t d t (C) 2 , 000 e 0.05 ∫ 0 10 e 0.12 ( 10 − t ) d t
Solution Summary: The author evaluates the expression 2,000e(0.05t)E0.12 (10-t
BIn Problems 15 and 16, explain which of (A), (B), and (C) are equal before evaluating the expressions. Then evaluate each expression to two decimal places.
16. (A)
∫
0
10
2
,
000
e
0.05
t
e
0.12
(
10
−
t
)
d
t
8.
For each of the following functions, determine whether or not it is (i) injective
and/or (ii) surjective. Justify why or why not.
(a) fiZZ defined by fi(n) = 2n.
(b) f2 RR defined by f2(x) = x² − 4x+7.
:
(c) f3 Z {0, 1} defined by f3(n) = 0 if n is even and f3(n) = 1 if n is odd.
(d) f4 Z N defined by f4(n) = 2n if n > 0 and f4(n) = -2n-1 if n < 0.
2.
Disprove the following by finding counterexamples:
3.
(a) For all sets A and B, AU (BNA) = B.
(b) For all sets A, B, and C, ANBCC if and only if ACC and B C C.
Suppose A and B are subsets of a universal set U. Using the set identities¹ prove
the following:
(a) (ANB) U(ANB) = B
(b) A (BA) = A
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Chapter 6 Solutions
MyLab Math with Pearson eText - Stand Alone Access Card - for Calculus for Business, Economics, Life Sciences & Social Sciences, Brief Version (14th Edition)
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