26. The value of {(.87)3 + (.13)3 + .87 × .39}0.5 is:
(a) 0.6
(b) 1
(c) 0
(d) 3

• (a^3 + b^3)=(a+b)(a^2-ab+b^2)
  so, (a^2-ab+3ab+b^2) ^0.5 , here a+b=1
  (0.87+0.13)^2*0.5
  =1
  so correct answer is (b)
  
• 10 years agoHelpfull: Yes(18) No(0)
• answer is 1
• 10 years agoHelpfull: Yes(7) No(2)
• (a+b)^3=a^3+b^3+3ab(a+b)
  a=0.87 b=0.13
  if ques is (a+b)^3*0.5=then ans is 0.5
  if((a+b)^3)^0.5 then ans=1
• 10 years agoHelpfull: Yes(5) No(0)
• all the ans. are wrong.
  the correct ans. s 1.669
• 10 years agoHelpfull: Yes(2) No(16)
• (.87)3 creates confusion of is it multiply or power of it
  
• 8 years agoHelpfull: Yes(2) No(0)
• It can be written as 1/2(0.87(3.39)+0.39)
  = 1.66965
  Option e) none of these(dummy q/a)
• 10 years agoHelpfull: Yes(0) No(10)
• 2.61+0.39+0.34=3.34
• 9 years agoHelpfull: Yes(0) No(0)