Educationgist
Nigeria Schools News, JAMB, UTME, WAEC, NECO, NABTEB, GCE, Direct Entry, Universities, Polytechnic and Colleges News

NECO 2020 | 2020 Further Mathematics Questions and Answers

Get real time updates directly on you device, subscribe now.

FURTHER MATHS OBJ

1-10: DDADAABCDC

11-20: BECEDEEDCA

21-30: DEDDBCECCA

31-40: CCDBEADACC

41-50: BABCEEECAC

(1)


(1)

5^2y + 1 = 26(5^y – 1)

Let 5^y = x

X² + 1 = 26(x/5)

5x² + 5 = 26x

5x² – 26x + 5 = 0

5x² – x -25x + 5 = 0

X(5x – 1) -5(5x – 1) = 0

(x – 5)(5x – 1) = 0

X – 5 = 0 OR 5x – 1 = 0

X = 5 OR X = 1/5

Since 5^y = x

If x = 5 OR if x = 1/5 ie 5^-1

5^y = 5¹ OR 5^y = 5^-1

y = 1 OR y = -1

 

name

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










 






(9)

name

name

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

(11)

(11a) 

1/1-sintita + 1/1+sintita

= 1+sintita+1-sintita/sin²tita

= 2/1-sin²tita

= 2/cos²tita

(11b) 

2x + 5≥1

2x ≥ -4

X ≥ -4/2

X ≥ -2

&

X+6 < 12

X < 12 – 6

X < 6

Range –> -2 ≤X<6

(11c) 

2tan15°/1 + tan²15° = Cos60°

Cos60°(1+tan²15°)=2 tan15°

½(1+tan²15°) = 2 tan 15°

1+ tan²15° = 4 tan 15°

Tan²15° – 4 tan 15° + 1 = 0

Using Formular method, 

tan 15° = -(-4)±√(-4)²-4(1)(1)/2(1)

tan 15° = 4±√16-4/2

tan 15° = 4±√12/2

tan 15° = 4±2√3/2

tan 15° = 2±√3

tan 15° = 2-√3 OR 2+√3

Therefore tan15° = 2-√3

name

You might also like
2 Comments
  1. Dah Royal Freshness says

    When will neco results 2019 come out..

    1. EducationGist says

      Always visit here as i will inform you once its out.

Leave A Reply

Your email address will not be published.