Waec Further Mathematics 2011 Past Questions and Answers

Question 16:

• WAEC 2011

A line is perpendicular to \(3x - y + 11 = 0\) and passes through the point (1, -5). Find its equation.

A. 3y - x -14 = 0
B. 3x + y + 1 = 0
C. 3y + x + 1 = 0
D. 3y + x + 14 = 0

Question 17:

• WAEC 2011

Solve \(9^{2x + 1} = 81^{3x + 2}\)

A. \(\frac{-3}{4}\)
B. \(\frac{-2}{3}\)
C. \(\frac{4}{5}\)
D. \(\frac{3}{2}\)

Question 18:

• WAEC 2011

The inverse of a function is given by \(f^{-1} : x \to \frac{x + 1}{4}\).

A. \(f : x \to 4x - 1\)
B. \(f : x \to 4x + 1\)
C. \(f : x \to \frac{4x - 1}{4}\)
D. \(f : x \to \frac{x - 1}{2}\)

Question 19:

• WAEC 2011

If \(\begin{pmatrix} 3 & 2 \\ 7 & x \end{pmatrix} \begin{pmatrix} 2 \\ 3 \end{pmatrix} = \begin{pmatrix} 12 \\ 29 \end{pmatrix} \), find x.

A. 5
B. 6
C. 7
D. 8

Question 20:

• WAEC 2011

The fourth term of a geometric sequence is 2 and the sixth term is 8. Find the common ratio.

A. \(\pm 1\)
B. \(\pm 2\)
C. \(\pm 3\)
D. \(\pm 4\)