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Level 2 Mathematics and Statistics (91261) 2020
Nov 19 2020 Apply algebraic methods
VECTOR ALGEBRA
Such quantities are called vectors. In mathematics physics and engineering
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2SUPERVISOR"S USE ONLY
LevelAchievement
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QUESTION ONE
(a)Factorise 6
2 - 15. 2 + 22. () in completed square form, i.e. () = ( + ) , where and are integers.0DWKHPDWLFVDQG6WDWLVWLFV
ASSESSOR'S
(c) In the 16th century, mathematicians were developing a formula to solve any cubic equation. y = x 3Px + R, where P and R are positive constants.
y = x 3 Px + R, for some values of P and R, passes through the xyFind an expression for P in terms of R.
4ASSESSOR'S
(ii) At point B it is true that 3x 2P = 0.
x = -2࣠ 0.50DWKHPDWLFVDQG6WDWLVWLFV
ASSESSOR'S
(iii) Consider again the curve with the equation y = x 3Px + R. As the values of P and R vary, the
xy P P Some examples of the graphs obtained from various values of P and R are illustrated below. P and R, the curve can intersect the x-axis three times. This will happen0DWKHPDWLFVDQG6WDWLVWLFV
Find the condition that P and R must satisfy for the graph to have three distinct x-intercepts.P and R are both positive integers.
ASSESSOR'S
QUESTION TWO
(a) Write as a single logarithm in simplest form: log(9) + log(4) - log(3). (36) = 2. ) + log ) = 4. 8ASSESSOR'S
(c) Solve the equation: 5+4 +4 34+1 =2. 9
ASSESSOR'S
(d) Consider two parabolas: y = ax 2 bx + c and y = dx 2 ex + c, where a, b, c, d, and e are constants. a, b, c, d, and e that would ensure0DWKHPDWLFVDQG6WDWLVWLFV
ASSESSOR'S
QUESTION THREE
(a)Solve the equation 3
= 30.W=(x+2)
2 5 , where is a whole number. the subject of the formula W=(x+2) 2 5 will the function have values less than 20?Please turn over
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ASSESSOR'S
(c) Zahra sells zips. Zahra notices that the higher the price of a zip, the fewer zips are sold. As of zips sold each day started at 98 and is dropping by 3 each day.Day, 1
Price of a zip ($) = 2d + 5
d 980DWKHPDWLFVDQG6WDWLVWLFV
ASSESSOR'S
(ii) Zahra realises that not every whole number is a possible turnover value for a given day. k must satisfy for it to be a0DWKHPDWLFVDQG6WDWLVWLFV
ASSESSOR'S
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ASSESSOR'S
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ASSESSOR'S
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