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Calculus- Early Transcendentals, 2021a

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44 Review<br />

Exercise 1.4.7 Simplify the expression<br />

[<br />

3(x + h) 2 + 4 ] − [ 3x 2 + 4 ]<br />

h<br />

as much as possible.<br />

Exercise 1.4.8 Simplify the expression<br />

x+h<br />

2(x+h)−1 − 2x−1<br />

x<br />

h<br />

as much as possible.<br />

Exercise 1.4.9 Simplify the expression −sinx(cosx + 3sinx) − cosx(−sinx + 3cosx).<br />

Exercise 1.4.10 Solve the equation cosx =<br />

√<br />

3<br />

2<br />

on the interval 0 ≤ x ≤ 2π.<br />

Exercise 1.4.11 Find an angle θ such that 0 ≤ θ ≤ π and cosθ = cos 38π<br />

5 .<br />

Exercise 1.4.12 What can you say about<br />

|x| + |4 − x|<br />

x − 2<br />

when x is a large (positive) number?<br />

Exercise 1.4.13 Find an equation of the circle with centre in (−2,3) and passing through the point<br />

(1,−1).<br />

Exercise 1.4.14 Find the centre and radius of the circle described by x 2 + y 2 + 6x − 4y + 12 = 3.<br />

Exercise 1.4.15 If y = 9x 2 + 6x + 7, find all possible values of y.<br />

Exercise 1.4.16 Simplify<br />

( 3x 2 y 3 z −1<br />

18x −1 yz 3 ) 2<br />

.<br />

Exercise 1.4.17 If y = 3x + 2 , then what is x in terms of y?<br />

1 − 4x<br />

Exercise 1.4.18 Divide x 2 + 3x − 5 by x + 2 to obtain the quotient and the remainder. Equivalently, find<br />

polynomial Q(x) and constant R such that<br />

x 2 + 3x − 5<br />

x + 2<br />

= Q(x)+ R<br />

x + 2

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