Questions asked by Neh Pandya

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• The focal length of a mirror is given by #1/f=1/u+1/v# where u and v represent object and image distances respectively,The maximum relative error in f is ?
  
• If #alpha, beta# are the roots of #x^2+px+q=0# and also of #x^(2n) + p^nx^n + q^n# = 0 and if #alpha/beta, beta/alpha# are the roots of #x^n + 1 + (x+1)^n = 0 ,# then prove that n must be an even integer?