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  • Question
  • For the inequation x^2?7x + 12 > 0, which one of the following is correct ?


  • Options
  • A. 3 < x < 4
  • B. ?? < x < 3 only
  • C. 4 < x < ? only
  • D. ?? < x < 3 or 4 < x < ?

  • Correct Answer
  • ?? < x < 3 or 4 < x < ? 

  • Tags: Bank Exams

    Simplification problems


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    • 1. If cot A = [sin B/(1 ? cos B)], then what is the value of cot 2A?

    • Options
    • A. cot(B/2)
    • B. cot 2B
    • C. cot B
    • D. tan B
    • Discuss
    • 2. If x3 ? y3 = 81 and x ? y = 3, then what is the value of x2 + y2 ?

    • Options
    • A. 18
    • B. 21
    • C. 27
    • D. 36
    • Discuss
    • 3. If (x + y + z) = 12, xy + yz + zx = 44 and xyz = 48, then what is the value of x3 + y3+ z3 ?

    • Options
    • A. 104
    • B. 144
    • C. 196
    • D. 288
    • Discuss
    • 4. If m n = 2 , mn = 15 , (m , n > 0) then the value of m2-n2m3-n3

    • Options
    • A. 1856
    • B. 1658
    • C. 1586
    • D. 1568
    • Discuss
    • 5. If 4(x+y) = 256 and (256)(x-y) = 4 , then what is the value of x and y?

    • Options
    • A. 17/8, 15/8
    • B. 17/4, 15/4
    • C. 9/17, 15/17
    • D. 8/17, 8/15
    • Discuss
    • 6. If tan x = 1, 0 < x < 90, then what is the value of 2 sin x cos x?

    • Options
    • A. 1/2
    • B. 1
    • C. ?3/2
    • D. ?3
    • Discuss
    • 7. What is the value of sin 46 cos 44+ cos 46 sin 44?

    • Options
    • A. 2
    • B. sin 2
    • C. 1
    • D. 0
    • Discuss
    • 8. Suppose 0 < ? < 90, then for every ? 4 sin2 ? + 1 is greater than or equal to ?

    • Options
    • A. 2
    • B. 4 sin ?
    • C. 4 cos ?
    • D. 4 tan ?
    • Discuss
    • 9. Consider a regular hexagon ABCDEF. Two towers are situated at B and C. The angle of elevation from A to the top of the tower at B is 30 deg, and the angle of elevation to the top of the tower at C is 45 deg. What is the ratio of the height of towers at B and C?

    • Options
    • A. 1:?3
    • B. 1:3
    • C. 1:2
    • D. 1:2?3
    • Discuss
    • 10. What is the value of tan 1° tan 2° tan 3°....... tan 89° ?

    • Options
    • A. 0
    • B. 1
    • C. 2
    • D. infinity
    • Discuss


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