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Revision Hints Curtin University Maths 120 Revision

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Page 1: Revision Hints Curtin University Maths 120 Revision

eVALUate is open Give eVALUate feedback on units and teachers through OASIS "My Studies and eVALUate" tab. Your feedback will be read and used to make improvements: make your comments specific and constructive. You could win great prizes (eight $200 cash prizes)

Page 2: Revision Hints Curtin University Maths 120 Revision

Marks will be posted on Blackboard, Friday study week. Online quiz (20%), individual & total Tut (20%) & Lab (10%), plus total out of 50%

Exam : Monday 18th November (1st Week) 12.00noon, Curtin Stadium (Building 111)

Available - Study Week: Mon 9:30-2:00, Tues 11:30-3:30, Wed 12:30-3:30, Thurs 9:30-3:30, Fri 9:30-12:00

Room: 314.358

Email: [email protected]

Tutors: Qian Sun, Peter, Christopher

Help: Maths Clinics – Maths Department 11-12 & 1-2pm (Wednesday 12-2pm) – EFY

Go over: Previous exams (EM120 Sem 2: 2006, 2008, 2009, 2010, 2011, 2012 EM140 Sem 1: 2009, 2010, 2011, 2012) Exercises at start of lecture notes Tutorial exercises Online quizzes

Page 3: Revision Hints Curtin University Maths 120 Revision
Page 4: Revision Hints Curtin University Maths 120 Revision

5 Questions, 20 marks each - Mishmash (Precalculus) - Differentiation & Application - Limits & Approximation - Integration & Complex Numbers - Matrices

Standard Integrals sheet is attached to exam A4 Sheet must be handwritten Only allowed HP 10s Scientific Calculator Show all working!

Page 5: Revision Hints Curtin University Maths 120 Revision

REVISION Domain & Range (Lecture 4)

- Domain: Don’t divide by 0 or don’t take square root of a negative number Limits of Functions (Lecture 5 & 22)

- Indeterminate forms 0 0 (factorize, cancel common term from numerator &

denominator) or ∞ ∞⁄ (divide through by highest power term in denominator),

- L’Hopital’s Rule ∞ ∞⁄ or 0 0 form

lim→

⇒ lim→

Composite of Functions (Lecture 6)

- Given and find ∘ , ∘ , etc… - Domain of a composite, evaluate the composite at

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Inverse of Functions (Lecture 6) - Given . Two steps: Rearrange so ; then interchange the and

variables.

Trigonometric Functions (Lecture 7) - Exact values, i.e. sin 45°

√ , cos 30° √ , tan 60° √3 , etc…

Symmetry of Functions (Lecture 8)

- Odd function , even function , or neither

Solving Unknown Triangles (Lecture 7 & 9) - Trigonometric Ratios (for right angle triangle)

sin , cos and tan

- Sine Rule

sin sin sin - Cosine Rule

cos ⇒ 2 cos

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Wave Functions (Lecture 9) - Identify amplitude, period, frequency, time displacement

Solving Trigonometric Equations (Lecture 9 & 10)

- Solve a trigonometric equation for ∈ ,

Polar Coordinates (Lecture 10) - Convert to and from Cartesian

cos and sin or

and tan check correct quadrant, either

Trigonometric Identities (Lecture 10) - sin sin , cos cos , tan tan

An Important Identity (Lecture 10)

- Express cos sin as a single cosine cos where √ and tan

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Differentiation - Elementary Rules (Lecture 11) - Product Rule (Lecture 11) - Quotient Rule (Lecture 11) - Trigonometric Functions (Lecture 12) - Chain Rule (Lecture 12) - Implicit (Lecture 13) - Logarithmic (Lecture 20)

Tangent & Normal Lines (Lecture 13)

- where , ,

- Normal line has slope 1

Taylor Series (Lecture 14) - Quadratic Approximation at :

!

- −th order Taylor Polynomial at :

2! ⋯ !

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Differentials (Lecture 15) - Find the differential of the function i.e . Use to estimate

change/error in given a change/error in Roots of Equations (Lecture 16) Bisection Method

- Given interval , which contains root & told number of steps/iterations Newton’s Method

- Given interval , which contains root & told number of steps/iterations as well as starting point

Elementary Curve Sketching (Lecture 17) - Stationary points/critical values, points of inflection on an interval , - Is stationary point a maximum or minimum, use first derivative test (sign

diagram) or second derivative test (if ′′ 0 then max, if ′′ 0 then min)

- Intervals of concavity, concave up on interval if ′′ 0 and concave down on interval if ′′ 0

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Integration by Substitution (Lecture 18 & 19) - State & make an appropriate substitution , evaluate the anti-derivate over the

lower & upper bounds (change upper & lower bounds in terms of ) Integration (Lecture 19)

- Fundamental Theorem of Calculus

Second:

Exponential & Logarithm Functions (Lecture 20 & 21) - Properties i.e. ln ln ln , ln ln , , etc... Used in

Logarithmic differentiation; to solve equations; etc… - Derivatives i.e. ⇒ ,

⇒ ln , ln ⇒ ,

log ⇒ etc..

Page 11: Revision Hints Curtin University Maths 120 Revision

Area Under Curves (Lecture 19 & 23) - To determine total area between curve and -axis between , : Plot function (if

feasible), determine if function cuts -axis (i.e. 0) over given interval , , if so (i.e. at ) partition , into appropriate subintervals over

which you then integrate,

Complex Numbers (Lecture 24, 25, 26 & 27)

- Basic arithmetic: add, multiply and divide - Conjugate ̅ - Convert between the different forms (Cartesian, polar & exponential) - If converting from Cartesian form to polar form check argument is in correct

quadrant, if not ±π - De Moivre’s Theorem: ∠ - Identify and sketch a region in the complex plane from an inequality - Determine the -th roots of a complex number

∠2

, 0, 1, 2, … , 1

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Matrices (Lecture 29, 30, 31, 32, 33 & 34) - Gaussian Elimination to solve a system of linear equations. Set up augmented

matrix | , get it into row-echelon form. When is there a unique, infinite or no solution. Understand concept of rank

- Solve a system of linear equations using the inverse matrix - Calculate the determinant of a matrix. If is 2 2 then det . If A

is 3 3 then do cofactor expansion along row or column with the most zeros - Find inverse of a matrix using Gauss-Jordan method. Set up matrix | , reduce

on RHS to then on LHS becomes . - Find inverse of a 2 2 matrix,

⇒ 1

- Find the eigenvalues λ of a matrix , i.e. solve det 0, and eigenvectors , 0

You need to obtain at least 40% in the exam to pass the unit! Supplementary Exam – 19-21st February 2014