ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 146:

• JAMB 1982

The solution of the quadratic equation bx2 + cx + a = 0 is given by

A. X = b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2a}\)
B. X = c \(\pm\) \(\frac{\sqrt{b^2 - 4ab}}{2b}\)
C. X = -c \(\pm\) \(\frac{\sqrt{c^2 - 4ab}}{2b}\)
D. X = -b \(\pm\) \(\frac{\sqrt{b^2 - 4ac}}{2b}\)

Question 147:

• JAMB 1982

The graphical method of solving the equation x3 + 3x2 + 4x - 28 = 0 is by drawing the graphs of the curves

A. Y = x³ and y = 3x² + x - 28
B. Y = x³ + 3x² + 4x + 4 and the line y = \(\frac{28}{x}\)
C. Y = x³ + 3x² + 4x and y
D. Y = x² + 3x + 4 and y = \(\frac{28}{x}\)
E. Y = x² + 3x + 4 and line y = 28x

Question 148:

• JAMB 1982

Find \(\alpha\) and \(\beta\) such that x\(\frac{3}{8}\) x y\(\frac{-6}{7}\) x (\(\frac{y^{\frac{9}{7}}}{x^{\frac{45}{8}}}\))\(\frac{1}{9}\) = \(\frac{y^{\alpha}}{y^{\beta}}\)

A. \(\alpha\) = 1, \(\beta\) = \(\frac{5}{7}\)
B. \(\alpha\)= 1, \(\beta\) = -\(\frac{5}{7}\)
C. \(\alpha\)= \(\frac{3}{5}\), \(\beta\) = -6
D. \(\alpha\)= 1, \(\beta\) = -\(\frac{3}{5}\)

Question 149:

• JAMB 1982

What is the least possible value of \(\frac{9}{1 + 2x^2}\) if 0 \(\geq\) x \(\geq\) 2?

A. 9
B. 5
C. 1
D. 2

Question 150:

• JAMB 1982

Solve for x, If \(\frac{\frac{2}{x}}{\frac{p^2 + p^2}{p^2 + p^2}}\) = m

A. \(\frac{4pq}{m(p + q)}\)
B. \(\frac{2p^2q^2}{m(q^2 + p^2)}\)
C. \(\frac{2pq}{m(q^2 + p^2)}\)
D. \(\frac{2p^2q^2}{m(p^2)}\)