Neco 2017 Mathematics Obj and Theory Exam Expo Runs Free Maths Answers

Neco 2017 Mathematics Obj and Theory Exam Expo Runs Free Maths Answers
Neco 2017 Mathematics Obj and Theory Exam Expo Runs Free Maths Answers




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VERIFIED MATHEMATICS OBJ

1-10 CCAADDEECE
11-20 EEBABAADCC
21-30 CBEEDABDDD
31-40 BCCCDDCADE
41-50 BDCDDCDECD
51-60 BCDCAEDCDD

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VERIFIED THEORY ANSWERS

(1)
tabulate:
Number-5932*6141
num 3679*3113
den
Log
3.7732
3.7882
7.5612
3.5657
3.4931
7.0588
anti log
7.5612
7.0588/0.5024/3=0.1675
anti log =1471*10

(2)
a = 3, b = 20, C = -7
Sum is
(α/1 + 1/β + β/1 + 1/ α) Note α means Alpha
α^2 β + β^2 + α + β / α β
= -7/3 (-20/3) + (-20/3) = 140/9 – 20/3 / -7/3
(please Note / means Divided)
= 80/9 x -3/7 = -80/21
Product:
-7/3 + 2 + 1/-7/3 = -7/3 + 2/1 – 3/7
= -49+42-9/21
= -16/21
x^2 – (sum)x + product= 0
x^2 – 80/21x + (-16/21) = 0
Final Answer : 21x^2 – 80x – 16 = 0

(3a)
P=100I/RT=100*30,000/4*3
P=N250,000

(5)
Put In tabular Form:
Mark- 21-25,26-30,31-35,36-40,41-45,46-50
F- 6,8,12,4,6,4=40
X- 23,28,33,38,43,48
FX- 138,224,396,152,258,192=1360
Class Boundaries- 20.5-20.5, 25.5-30.5,35.5-40.50,40.5-45.5
(5i)
MEAN
(X)=EFX/EF=1360/40=34
MODE
L1+[Fm-Fa/2fm-fa-fb]c
=30.5+[12-8/2(12)-8-4]5
=30.5+[4/12]5
=30.5+1.67
=32.17

(7a)
a+2d=11 —-eq (1)
-(a+8d)=29 —-eq (2)
-6d/-6d = -18/-6
d=3
sub for d=3 in —-eq (1)
a+2(3)=11
a+6=11
a=11-6=5
(7b)
L = ar^n-1
729/3 = 3/3 x 3^n-1
243 = 3^n-1
3^5 = 3^-1
5 = n-1
N = 5+1
= 6
Sn = a(r^-1)/r-1 = 3(3^6 – 1)/3-1
Sn = 3( 729 -1)/2
S6 = 3 x 728/2
S6 = 1092
(7c)
3x^3/3 + x | 2,1
(2^3 + 2) – (1^3+1)
(8+2) – (1+1)
= 8

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