Jamb Mathematics Past Questions For Year 1992

Question 16

Find all values of x satisfying the inequality -11 \(\leq\) 4 - 3x \(\leq\) 28

jamb 1992

• A. -5 \(\leq\) x v 8
• B. 5 \(\leq\) x \(\leq\) 8
• C. -8 \(\leq\) x \(\leq\) 5
• D. -5

Question 17

Find the sum to infinity to the following series 3 + 2 + \(\frac{4}{3}\) + \(\frac{8}{9}\) + \(\frac{16}{17}\) + .....

jamb 1992

• A. 1270
• B. 190
• C. 18
• D. 9

Question 18

For an arithmetical sequence, the first term is 2 and the common difference is 3. Find the sum of the first 11 terms

jamb 1992

• A. 157
• B. 187
• C. 197
• D. 200

Question 19

p = \(\begin{vmatrix} x & 3 & 0 \\ 2 & y & 3\\ 4 & 2 & 4 \end{vmatrix}\)

Q = \(\begin{vmatrix} x & 2 & z \\ 3 & y & 2\\ 0 & 3 & z \end{vmatrix}\) Where \(p^T\) is the transpose P calculate /\(p^T\)/ when x = 0, y = 1 and z = 2

jamb 1992

• A. 48
• B. 24
• C. -24
• D. -48

Question 20

p = \(\begin{vmatrix} x & 3 & 0 \\ 2 & y & 3\\ 4 & 2 & 4 \end{vmatrix}\)

Q = \(\begin{vmatrix} x & 2 & z \\ 3 & y & 2\\ 0 & 3 & z \end{vmatrix}\)

PQ is equivalent to

jamb 1992

• A. \(PP^T\)
• B. \(pp^{-1}\)
• C. qp
• D. pp