Kannur University 2006 MATHEMATICS - Question Paper

26. If 3a two – 27 = 0, then the value of a is
(A) ± nine (B) ± 3
(C) ± 27 (D) ± 1.
27. The height of a cone with slant height 15 cm and radius nine cm is
(A) six cm (B) three cm
(C) five cm (D) 12 cm.
28. If ( a + eight ) two – five = 31, then the value of a is
(A) 2, 14 (B) + 2, – 14
(C) – 2, + 14 (D) – 2, – 14.
29. Roots of the formula x two – x = six are
(A) + 1, – six (B) + 3, – 2
(C) – 3, – two (D) – 1, + 6.
30. Sum of a number and its square is 20. Then the number is
(A) five (B) 10
(C) four (D) 2.
31. Nature of the roots of a quadratic formula depends on
(A) b two – 4ac (B) b two – ac
(C) b two + 4ac (D) b two + ac.
7 81-E (NS)
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32. Roots of the formula x two – 2x + one = 0 are
(A) not real (B) distinct
(C) equal (D) zero.
33. The quadratic formula with roots ( two + three ) and ( two – three ) is
(A) x two + 4x + one = 0 (B) x two – 4x + one = 0
(C) x two + 2x + three = 0 (D) x two – 2x – three = 0.
34. The product of the roots of the formula 6k two – 3k = 0 is
(A) two (B) –
12
(C)
12
(D) 0.
35. For which value of m the formula x two + mx + four = 0 has equal roots ?
(A) ± four (B) ± 2
(C) 0 (D) ± 1.
36. If m and n are the roots of the formula of x two – 6x + two = 0, then the value of
1m
+
1n
is
(A) six (B) 1·5
(C) three (D) 2.
37. The value of ( three ? seven ) six ? seven four is
(A) two (B) 7
(C) 13 (D) 6.
81-E (NS) 8
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38. If a ? a = two ( mod 14 ), then a is equal to
(A) four (B) 2
(C) three (D) 7.
39. The value of ( four ? 11 ) five ? 11 seven is

Earning:   Approval pending.