2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
EXPOLORD.CO ANSWERS PAGE
EXPOLORD.CO ANSWERS PAGE
Monday, 9th April, 2018
Further Mathematics 2 (Essay) – 08:30 a.m. – 11:00 a.m.
Further Mathematics 1 (Objective) – 13:00 a.m – 14:30 p.m
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Maths OBJ:
1-10: BCADDDDDBB
11-20: DBABCCDDCC
21-30: BCABBAABAB
31-40: CBADBDDCAB
PLS NOTE THAT ^ MEANS RAISE TO POWER
(1)
X-3|2 2|+4|5 2 |+3|5 2|= -24
| -4 6-x| |2 6-x| |2 -4|
X-3(12-2x+8)+4(30-5x-4)+3(-20-4) = -24
X-3(20-2x)+4(26-5x)+3(-24)= -24
20x – 2x² – 60 + 6x + 104 – 20x – 72 = -24
-2x² + 6x – 60+104-72+24 = 0
-2x² + 6x – 4 = 0
Divide through by -2
X² – 3X + 2 = 0
X² – 2X – X + 2= 0
X(X-2)-1(X-2)=0
(X – 1)(X – 2)=0
X=1 OR X=2
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(3a)
U= x-2 ; hence X = u+2
Therefore :
X^3+5/(x-2)^4 = (u+2)^3+5/ (u+2-2)^4
=(u+2)^3+5/u^4
(3b)
(u+2)^3+5/u^4 = (u+2)^3/u^4 + 5/u^4
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(5)
TABULATE
cooking oil type|a|b|c|d|e|f|g|h
x|8|5|1|7|2|6|3|4
y|6|3|4|8|5|7|1|8
d|2|2|-3|-1|-3|-1|2|2
d²|4|4|9|1|9|1|4|4
£d² = 4+4+9+1+9+1+4+4 = 36
r = 1- 6£d²/n(n²-1)
= 1 – 6×36/8(8²-1)
= 1 – 216/504
= 1 – 0.43
= 0.57
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(6)
It follow that:
P(n) = 1/3 and p(k)¹ = 1 – 1/3 = 2/3
P(T) = 1/5 and P(T)¹ = 1- 1/5 = 4/5
Hence,
probability that only one if the them will be solve the questions will be:
= (1/3 × 4/5) + (1/5 × 2/3)
= 4/15 + 2/15
= 6/15
= 2/5
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(7)
m = 3i – 2j ; n = 2i + 3j ; p = i + 6j
Therefore:
4(3i – 2j) +2(2i +3j) -3(-i + 6j)
12i – 8j + 4i + 6j + 3i – 18j
12i + 4i + 3i – 8j + 6j – 18j
19i = 20j
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(8)
m1 = 20kg
u1 = 8ms-1
m2 = 30kg
u2 = 50ms-1
(a)
In same direction
m1u1 + m2u2 = (m1+m2)v
20 × 80 + 30 × 50 = (20+30)v
1600+1500 = 50v
3100/50 = 50/50
V = 62ms-1
(b)
In opposite direction
m1u1 – m2u2 = (m1 + u2)V
20×30 – 30×50 = (20+30)V
1600 – 1500 = 50V
100/50 = 50V/50
V = 2m/s
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(9)
Draw the pie chart diagram
radius is the same hence
(y – 2)² + (X – 3)² = (y + 4)² + (X – 5)² = (y + 1)² + (X + 2)²
Taking the first pair
Y² – 4y + 4 + x² – 6x + 9 = y² + 8y + 16 + x² – 10x + 25
– 6x – 4y + 13 = -10x+8y+41
4x – 12y = 28
X = 3y = 7——–(1)
Taking the second pair
Y² + 3y + 16+x² – 10x+25 = y²+ 2y + 1 + x²+ 4x + 4
-10x + 3y + 41 = 4x + 2y + 5
14x – 6y = 36
7x – 3y = 18———(2)
Eqn 2 minus Eqn 1
6x = 11
X = 11/6
Put this into Eqn (1)
11/6 – 3y = 7
3y = 11/6 – 7
3y = 11 – 42/6
3y = -31/6
y = -31/18
(a) coordinates of centre is (11/6, -31/18)
(b) Radius r = √(y-2)²+(x-3)²
r = √-31/18 -2)² + 11/6 – 3)²
r= √13.85 + 1.36
r = 3.9
(c) (X – 11/6)² + (y + 31/18)² = 3.9²
(X – 11/16)² + (y + 31/18)² = 15.21
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(15)
(a)
DRAW THE DIAGRAM
(b)
(2.2) + 80(0.6) = 300(1.2) + 100 (3)
2.2B + 48 = 360 + 300
2.B + 48 = 660
2.2B = 660 – 48
2.2B = 612
Reation at B = 278.18N
Taking moment about B
80(2.1) + 300(1) = 2.2A + 100 (0.8)
224 + 300 = 2.3A + 80
524 – 80 = 2.2A
A = 444/2.2
Reaction a+ A = 201.82N
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2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
2018 WAEC RUNZ FURTHER MATHEMATICS ESSAY & OBJ QUESTIONS AND ANSWERS
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