16. Simplify:
(1.3*1.3*1.3-1)/(1.3*1.3+1.3+1)
(a) .3
(b) 31/3
(c) ..3
(d) 1

• question is in the form of
  (a^3 - b^3 ) / (a^2 + ab + b^2)
  where a=1.3 & b=1, Note Formula: (a^3 - b^3) = (a-b) (a^2 + ab + b^2)
  so question is reduced to (a-b) that is (1.3 - 1) = 0.3
  therefore option (a)
• 10 years agoHelpfull: Yes(11) No(0)
• Let a=1.3
  (a^3-1)/(a^2+a+1)
  =(a^3-1^3)/(a^2+a+1)
  =(a-1)(a^2+a*1+1^2)/(a^2+a+1)
  =a-1
  =1.3-1
  =0.3
• 9 years agoHelpfull: Yes(2) No(0)
• 1.197/3.99->0.3
  (A).3
• 10 years agoHelpfull: Yes(1) No(0)
• a^3 + b^3 =(a-b)(a^2 + ab+ b^2) a=1.3, b=1 ans =0.3
• 9 years agoHelpfull: Yes(1) No(1)
• 1.197/3.99->0.3
  (A).3
• 10 years agoHelpfull: Yes(0) No(0)
• Option a)0.3
  
  (1197/3990)
• 10 years agoHelpfull: Yes(0) No(0)