Mathematics 1984 JAMB Past Questions

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The sides of a triangle are(x + 4)cm, xcm and (x - 4)cm, respectively If the cosine of the largest angle is \(\frac{1}{5}\), find the value of x

A. 24cm
B. 20cm
C. 28cm
D. 7cm
E. \(\frac{88}{7}\)

View Answer & Discuss (3) JAMB 1984

If a = \(\frac{2x}{1 - x}\) and b = \(\frac{1 + x}{1 - x}\), then a2 - b2 in the simplest form is

A. \(\frac{3x + 1}{x - 1}\)
B. \(\frac{3x^2 - 1}{(x - 1)}\)²
C. x\(\frac{3x - 2}{1 - x}\)
D. \(\frac{3x^2 - 1}{(x - 1)}\)

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Simplify (1 + \(\frac{\frac{x - 1}{1}}{\frac{1}{x + 1}}\))(x + 2)

A. (x² - 1)(x + 2)
B. x²(x + 2)
C. ² + 34
D. \(\frac{3x^2 - 1}{(x - 1)}\)

View Answer & Discuss (2) JAMB 1984

If pq + 1 = q² and t = \(\frac{1}{p}\) - \(\frac{1}{pq}\) express t in terms of q

A. \(\frac{1}{p - q}\)
B. \(\frac{1}{q - 1}\)
C. \(\frac{1}{q + 1}\)
D. 1 + 0
E. \(\frac{1}{1 - q}\)

View Answer & Discuss (3) JAMB 1984

The cumulative frequency function of the data below is given below by the equation y = cf(x). What is cf(5)?
\(\begin{array}{c|c} Score(n) & Frequency(f)\\\hline 3 & 30\\ 4 & 32\\ 5 & 30\\ 6 & 35\\8 & 20 \end{array}\)

A. 30
B. 32
C. 55
D. 62
E. 92

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Mathematics 1984 JAMB Past Questions

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