Jamb 1987 Mathematics Questions
Question 16:
The formula Q = 1.5 + 0.5n gives the cost Q(in Naira)of feeding n people for a week. Find (in kobo) the extra cost of feeding one additional person
View Answer & ExplanationQuestion 17:
If P varies inversely as V and V varies directly as R2, find the relationship between P and R given that R = 7 when P = 2
- A P = 98R<sup style='font-size: smaller;'>2</sup>
- B PR<sup style='font-size: smaller;'>2</sup> = 98
- C P = \(\frac{1}{98R^{2}}\)
- D P = \(\frac{PR^{2}}{98}\)
Question 18:
Make y the subject of the formula Z = x\(^2\) + \(\frac{1}{y^3}\)
- A Y = \(\frac{1}{(Z - x^2)^3}\)
- B Y = \(\frac{1}{(Z + x^2)^{\frac{1}{3}}}\)
- C Y = \(\frac{1}{(Z - x^2)^{\frac{1}{3}}}\)
- D Y = \(\frac{1}{\sqrt[3]{Z} - \sqrt[3]{x^2}}\)
Question 19:
Find the values of m which make the following quadratic function a perfect square. x2 + 2(m + 1)x + m + 3
- A -1, 1
- B -1, 2
- C 1, -2
- D 2, -2
Question 20:
Factorize 62x + 1 + 7(6x) - 5
- A [3(6<sup style='font-size: smaller;'>x</sup>) - 5][2(6<sup style='font-size: smaller;'>x</sup>)m + 1]
- B [3(6<sup style='font-size: smaller;'>x</sup>) + 5][2(6<sup style='font-size: smaller;'>x</sup>) - 1]
- C [(6<sup style='font-size: smaller;'>x</sup>) - 5][3(6<sup style='font-size: smaller;'>x</sup>) + 1]
- D [2(6<sup style='font-size: smaller;'>x</sup>) + 5][3(6<sup style='font-size: smaller;'>x</sup>) - 1]