ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 466:

• JAMB 2007

A binary operation Δ is defined by aΔb = a + b + 1 for any numbers a and b. Find the inverse of the real number 7 under the operation Δ, if the identity element is -1

A. -7
B. -9
C. 5
D. 9

Question 467:

• JAMB 2007

The nth term of the sequence ³/₂, 3, 7, 16, 35, 74 ..... is

A. 5 . 2^n-2 - n
B. 5 . 2^n-2 - (n+1) / 2
C. 3 . 2^n-2
D. ³/₂ n

Question 468:

• JAMB 2007

Find the sum to infinity of the series \(2+\frac{3}{2}+\frac{9}{8}+\frac{27}{32}+......\)

A. 1
B. 2
C. 8
D. 4

Question 469:

• JAMB 2007

Find the value of x for which 2(3^2x-1) = 162

A. ⁵/₂
B. ³/₂
C. ²/₅
D. ¹/₂

Question 470:

• JAMB 2008

Make Q the subject of formula when \(L=\frac{4}{3}M\sqrt{PQ}\)

A. \(\frac{9L^2}{16M^2}P\)
B. \(\frac{3L}{4M\sqrt{P}}\)
C. \(\frac{\sqrt{3L}}{4MP}\)
D. \(\frac{3L^2}{16M^2}P\)