# Nabteb Gce 2021. Maths answers : Nabteb Gce 2019. Maths answers Night before Exam

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OBJ

1-10: DABBABBBAD

11-20: CDBDCCCBBA

21-30: CDABDACCCC

31-40: BCBCABABBC

41-50: DACCCCDBDB

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*SECTION A*

*_(Answer ALL QUESTIONS From This Section)_*

(1a)

6^n+1*9^n*4^2n/18^n*2^n*12^2n

=(2*3)^n+1*(3*3)^n*(2*2)^2n/(2*3*3)^n*2^n*(2*2*3)^2n

=2^n+1*2^n+1*3^n*3^n*2^2n*2^2n/2^n*3^n*3^n*2^n*2^n*2^n*3^2n

= 2^n*2^1*2^n*2^1*3^n*3^n*2^n*2^n*2^n*2^n/2^n*3^n*3^n*2^n*2^n*2^n*2^n*2^n*3^n*3^n

= 2^6n*3^2n*2*2/2^6n*3^4n

= (2^6n / 2^6n) *(3^2n / 3^4n)*2*2

=2^6n - 6n * 3^2n - 4n * 4

= 2^0 * 3^-2n * 4

= 4*3^-2n

= 4 * 1/3^2n

= 4/3^2n

(1b)

Log 243/log 27

= log 3^5/log 3^3

= 5log3/3log3 = 5/3 = 1 whole no 2/3

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
========

(2a)

3t - 2p = 8×2 ...(I)

2t - 3p = 14×2...(II)

6t - 4p = 16 ...(III)

6t - 9p = 42 ...(IV)

9P - 4P = -42 + 16

5p = -26

P = -26/5 = -5 1/5

Put p = -26/5 into eqn (I)

3t - 2(-26/5) = 8

3t + 52/5 = 8

3t = 8 - 52/5

3t = 40 - 52/5 = -12/5

Divide both sides by 3

36/3 = -12/5 / 3

t = -12/5 × 1/3

= -12/15 = -4/5

(2b)

3/√3(2/√3 - √12/6)

2/√3 × 3/√3 - 3/√3 × √12/6

6/√9 - 3√12/6/√3

6/3 - 3√12/6√3

2 - √12/2√3

2 × 2√3 - √12/2√3

4√3 - (√4 × 3)/2√3

= 4√3 - 2√3/2√3

= 2√3/2√3 = 1

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
========

(3)

P(k) = 2/3

P(Y) = 5/8

P(I) = 3/4

P(k fail) = 1- 2/3 = 1/3

P(Y fail) 1 - 5/8 = 3/8

P(I fail) = 1 - 3/4 = 1/4

(a) 2/3*5/8*3/4 = 5/16

(b) 1/3*3/8*1/4 = 1/32

(c) 2/3*5/8*1*4 = 5/48

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)

Nabteb Gce 2021. Maths answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
=

(4)

Draw the triangle

<GFN = 180 - ( 68+90)

Sum of angles in a Δ

= 180 - 158 = 22

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### QUESTIONS AND ANSWERS FOR Nabteb Gce 2021. Maths answers

#### EXAM DETAILS:

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Updated At: April 17th 2021, (06:04:48)

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Amaruegosi Chinenye F. said: my waec is 4 B, 2 A, 3 C tnx sir for d help... view all reviews