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  • Question
  • Simplify ( 6a-2bc-3/4ab-3c2 ) ÷ ( 5a-3 b2c-1/3ab-2c3 )


  • Options
  • A. 9/10ac
  • B. 9/10ac-1
  • C. 9/10ac2
  • D. 9/10ac-3

  • Correct Answer
  • 9/10ac-1 

    Explanation

    Given equation is,
    ( 6a-2bc-3/4ab-3c2 ) ÷ ( 5a-3 b2c-1/3ab-2c3 )
    Apply the algebra law a ÷ b = a x 1/b
    = ( 6a-2bc-3/4ab-3c2 ) x ( 3ab-2c3/5a-3 b2c-1 )
    = ( 6a-2 bc-3 x 3ab-2c3) / ( 4ab-3c2 x 5a-3b2c-1 )
    Apply the law of Fractional Exponents and Laws of Exponents
    (am)(an) = am+n
    am÷an=am-n
    Or
    am/an=am-n
    = 18a-2 + 1 b1 - 2 c -3 + 3 / 20a1 - 3 b-3 + 2 c2 - 1
    = 9a-1b-1c0/ 10a - 2 b-1c1
    = ( 9/10 ) a-1 + 2b-1 + 1 c0 - 1
    = ( 9/10 ) a1b0 c-1
    = ( 9/10 ) ac-1 [? b0 = 1]


  • More questions

    • 1. 
      Find the effective annual rate of 4 per cent per annum compound interest paid quarterly.?

    • Options
    • A. 4.0604%
    • B. 4.604%
    • C. 5.0605%
    • D. 5.605%
    • Discuss
    • 2. 
      Three runners running around a circular track can complete one revolution in 2, 4 and 5.5 respectively. When will they meet at starting point?

    • Options
    • A. 40 h
    • B. 44 h
    • C. 20 h
    • D. 22 h
    • Discuss
    • 3. 
      A boat moves downstream at 1 km in 5 minutes and upstream at 1 km in 12 minutes.What is the speed of current?

    • Options
    • A. 4.5 km/h
    • B. 3.5 km/h
    • C. 2 km/h
    • D. 2.5 km/h
    • Discuss
    • 4. 
      The difference of two number is 5 and the difference of their squares is 135. The sum of the number is?

    • Options
    • A. 27
    • B. 25
    • C. 30
    • D. 32
    • Discuss
    • 5. 
      (20 ÷ 5) ÷ 2 + (16 ÷ 8) x 2 + (10 ÷ 5) x (3 ÷ 2) =?

    • Options
    • A. 9
    • B. 12
    • C. 15
    • D. 18
    • Discuss
    • 6. 
      Average of a, b and c is 11; average of c, d and e is 17; average of e and f is 22 and average of e and c is 17. Find out the average of a, b, c, d, e and f?

    • Options
    • A. 152/3
    • B. 181/2
    • C. 211/3
    • D. 161/2
    • Discuss
    • 7. 
      22 men can complete a job in 16 days. In how many days, will 32 men complete that job?

    • Options
    • A. 14
    • B. 12
    • C. 16
    • D. None of these
    • Discuss
    • 8. 
      In how many years, a sum will become four times itself at the rate of 12% per annum?

    • Options
    • A. 28 yr
    • B. 25 yr
    • C. 22 yr
    • D. 27 yr
    • Discuss
    • 9. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is:

    • Options
    • A. 12
    • B. 16
    • C. 24
    • D. 48
    • Discuss
    • 10. 
      Shard cover two-third of a certain distance at 4 km/hr and the remaining at 5 km/hr. If he takes 42 minutes in all, the distance is?

    • Options
    • A. 2.5 km.
    • B. 4.6 km.
    • C. 4 km.
    • D. 3 km.
    • Discuss


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