# 2010 Promo Ans.doc - TJC 2010 Promo Exam H2 Maths Solutions...

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Chapter 1 / Exercise 107
College Algebra
Gustafson/Hughes
Expert Verified
TJC 2010 Promo Exam H2 Maths Solutions General comments: 1 Inappropriate use of a GC Q10(b) “Using an algebraic method, solve the inequality” Q13(a)(i) “Find the exact value of the integral” 2 Show sufficient/detailed working when the answer is given. 3 Use of brackets is necessary. 10
___ ___ ___ ___ . . . . . ___ (We do not need to arrange among the 10 men as that will be result in repetitions) No. of arrangements = (5 − 1)! 5! = 2880 2 Let the unit cost for electricity be \$ x per kWh, gas be \$ y per kWh and water be \$ z per m 3 . Utilities bill for May: 200 12 6.5 57 x y z ---------- (1) June: 250 10 6.24 68.09 x y z ---------- (2) July: 210 0.0057 11 6.76 60.66 x y z 1 First arrange the 5 women in a circle Arrange/slot in the 5 men in the 5 seats between the 5 women W 1 W 2 W 3 W 4 W 5 Arrange the 10 women in the 10 seats
##### We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
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Chapter 1 / Exercise 107
College Algebra
Gustafson/Hughes
Expert Verified
TJC 2010 Promo Exam H2 Maths Solutions P P ,
2
TJC 2010 Promo Exam H2 Maths Solutions 4 Let a and r be the first term and common ratio of the arithmetic and geometric progression respectively. 2 4 4 2 4 a r a r      ------------- (1) 2 4 2 4 4 4 4 a a r a r   2 4 4 2(2) 4( ) 4 a a r   2 2 0 a r --------------- (2) Sub (1) into (2), 2 2 4 2 0 r r 2 2 4 2 0 r r 2 2 1 0 r r 2 2 2 1 2 2 r 1 2 r