M@ths 2017 Neco £xpo Page

By 02:43 Tue, 13 Jun 2017 Comments


===================

Wednesday 14th June 2017

Paper III: OBJ – General Mathematics – 10am – 11:45am

Essay – General Mathematics – 12pm – 2:30pm

====================

You're here because you subscribed for Maths Neco 2017 Expo.

Answer will be posted here soon,

Just don't share this page to not leak the answers to

VERIFIED MATHEMATICS OBJ

1-10 CCAADDEECE

11-20 EEBABAADCC

21-30 CBEEDABDDD

31-40 BCCCDDCADE

41-50 BDCDDCDECD

51-60 BCDCAEDCDD

(1)

TABULATE

No|Log|

5932|3.7732|

*6141|3.7882|

Num|7.5612|7.5612

3679|3.5657|

*3113|3.4931|

Den|7.0588|7.0588

| |0.5024/3=0.1675

Antilog:-1.471*10^0

=1.471

(2)

a = 3, b = 20, C = -7

Sum is

(A/1 + 1/B + B/1 + 1/ A) Note A means Alpha and B means beta

A^2 B + B^2 + A + B / AB

= -7/3 (-20/3) + (-20/3) = 140/9 - 20/3 / -7/3

= 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

(3b)

#7000 to Francs

#1 = 8 francs

.:.#7000 = ? france

CROSS MULTIPLY

8/1 * 7000 = 56,000 franc

Spending 49,400 franc

56, 000- 49,400 = 6600

Converting 6 ,600 franc to # AT 10 franc TO 1#

10 franc —– 1#

6600 FRANCS —? #

= 6,600/10 X 1

=#660

(4i)

difference in latitude=36degree + 36 degree =72degree

distance travelled=@/360*2pir

=72/360*2*22/77*64

=20275200/2520

=8045.71

=8050km(35.f)

(4ii)

given that speed =800km/hr

distance travelled =804571km

time=distance travelled/speed

=8045.71/800

=10.057

=10hrs(to the nearest hour)

================

(5)

Tabulate

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

L 1+ [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

====================

6i)

7+8+x = 47

15+ 2x =47

2x = 47- 15

2x/2 = 32/2

divide both side by 2

x=16

6ii)

tran only;:

7+8 + 3 + y=30

18 +y =30

y=30 -18 =12

:. Tran only =12

iii) at least two: 7+ 16+ 3 +8 =34

iv)16 + 7 +12 +16 +8 + 3 + Q=95

62+ Q =95

Q= 95 -62

Q=33 :. Car only = 33

=========================

(7a)

a+2d=11---eq1

-(a+8d)=29

-6d/-6=-18/-6

d=3

Sub for d=3 in eq1

a+2(3)=11

a+6=11

a=11-6

a=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

8ai)

y=(4x+9)^3

let u =4x+9, y=U^3

du/dx=4, dy/du=3U^2

dy/dx=dy/du * du/dx = 4*3u^2=12u^2

recall= U=4x+9

dy/dx=12(4x+9)^2

8aii)

y=(3x-2)^3 (x^2 + 4)^2

u=(3x-2)^3 V=(x^2+4)^2

du/dx=3.3(3x-2)^3-1 , dv/dx=2x.2(x^2+4)^2-1 

=4x(x^2+4)

in other words

dy/dx=Vdu/dx + udv/dx

=(x^2+4)^2 9 (3x-2)^2+(3x-2)^3 4x(3x-2)

=(x^2+4) (3x-2)^2 (9x^2+36+12x^2-8x)

=(x^2+4) (3x-2)^2 (21x^2-8x+36)

8b)

y-y1=m(x-x1)

y-6=2(x-2)

y-6=2x-4

y=2x-4+6=2x+2

(11a)

Tabulate

X- |-1| |0| |1| |2| |3| |4|

6 |6| |6| |6| |6| |6| |6|

+X |-1| |0| |1| |2| |3| |4|

-X^2 |-1| |0| |-1| |-4| |-9| |16|

Y- |4| |6| |6| |4| |0| |-6|

(11b)

Draw the graph

(11ci)

gradient at x/x

dy/dx =B-A/B-C

=7-4/2-1=3/1=3

(11cii)

roots of equation from the graph

x=-2.2 and x=3

(11ciii)

minimum value of y

=6.4

(12a)

Fro Economics

3x + 2y - 12

3x+2y=90+12

3x+2y=102...(1)

sum of angle in a circle = 360 degree

5x+y-9+3x+2y-12+3y+4x+21=360

5x+3x+4x+y+2y+3y-9-12+21=360

12x+6y=360....(2)

Solving equation (1) and (2) simultaneously

3x+2y=102

12x+6y=360

Using elimination method

3x + 2y=102 *4

12x+ 6y=360 *1

--------------

2y/2 = 48/2

y = 24

Substitute y=24 into equation (1) for x

3x+2y=102

3x+2*24=102

3x+48=102

3x=102-48

3x=54

x=54/3

x=18

.:.x+y=18+24

x+y = 42

(12b)

Candidates that are registered for literature

=4x+21/360 * 1200

=4(18)+21/360 * 1200

=72+21/360 * 1200

=93/360 * 1200

=111600/360

=310

Candidates that registered for government

= 3y/360 * 1200

=3(24)/360 * 1200

=72/360 * 1200

=86400/360

=240

310-240=70

.:.The candidates that registered for literature are 70 higher than candidates that registered for government.

=================

NOTE THE FOLLOWING SYMBOLS:

^ means rasie to power

# is naira sign

* multiply

pie is a pie sign

===================







[img] [/img]

[img] [/img]

[img] [/img]

VERIFIED MATHEMATICS OBJ

1-10 CCAADDEECE

11-20 EEBABAADCC

21-30 CBEEDABDDD

31-40 BCCCDDCADE

41-50 BDCDDCDECD

51-60 BCDCAEDCDD

Answers loading (loading)

.


Advertisement pool

Advertisement





Related Article

Comment
Name




.....................

Please LOGIN or REGISTER To Gain Full Access To This Article