Jamb Mathematics 2015 Past Questions and Answers

Question 46:

• JAMB 2015

Evaluate log5(\( y^2x^5 ÷ 125b½) \)

A. 2 log₅y + 5log₅ y² − 3
B. Log₅ y² + 5log₅ x + 3
C. 25log_y 5 + 3
D. 2log₅y + 5log₅x − ½ log₅b −3

Question 47:

• JAMB 2015

Integral ∫\( (5x^3 + 7x^2 − 2x + 5)\)dx

A. \( \frac{5x^4}{4} + \frac{7x^3}{3} + 2x + C \)
B. \( \frac{5x}{4} + \frac{7x^3}{3} - x^2 + 5x + C \)
C. \( \frac{5x^3}{3} + \frac{7x^2}{x} - x + C \)
D. \( \frac{2x^2}{3} + \frac{x}{5} - C \)

Question 48:

• JAMB 2015

Find the area of the curved surface of a cone whose base radius is 3cm and whose height is 4cm (π = 3.14)

A. 17.1cm²
B. 27.2cm²
C. 47.1cm²
D. 37.3cm²

Question 49:

• JAMB 2015

Simplify \( \frac{1}{(x + 1)} + \frac{1}{(x − 1)} \)

A. 2x/(x + 1)(x−3)
B. 2/(x + 1)(x−1)
C. 2x/(x + 1)2
D. 2x(x+1)2

Question 50:

• JAMB 2015

The area of a circle of radius 4cm is equal to (Take π = 3.142 )

A. 10.3cm²
B. 15.7cm²
C. 50.3cm²
D. 17.4cm²