Quantitative Aptitude Important Formulas

Surds and Indices - Important Formulas,Tricks and Examples

Rules of Indices:

  1. am * an = am + n
  2. am­ / an = am-n
  3. (am)n = amn
  4. (ab)m = ambm
  5. ( a / b )m = ( am / bm )
  6. a0 = 1
  7. a-m = ( 1 / am )

Rules of Surds:

  1. n√a= a1/n
  2. (n√a )n= a
  3. n √ab = n √a * n √b
  4. n √a/b = n √a / n √b
  5. (n √a)n = a
  6. m√(n√(a)) = mn√(a)
  7. (n√a)m = n√am

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