7, 4, 6, 3, 4.5, 1.5, 2.25, -0.75, ?

• ans is -1.125
  7-4 =3
  4*3/2 =6
  6-3 =3
  3*3/2 =4.5
  4.5-1.5=3
  1.5*3/2=2.25
  2.25-(-0.75)=3
  -0.75*3/2 = -1.125
  
• 11 years agoHelpfull: Yes(18) No(0)
• answer is -1
• 11 years agoHelpfull: Yes(11) No(3)
• the ans will be 1
  
  4-7=-3
  6-4=2
  3-6=-3
  4.5-3=1.5
  1.5-4.5=-3
  2.25-1.5=0.75
  -0.75-2.25=-3
  
  
  so,we get -3 alternately..and formed a second series without -3,
  2,1.5,0.75
  
  2-1.5=0.5
  1.5-0.75=0.75
  
  so the next will be 0.75+1=1.75
  
  and finally the last term will be
  -0.75+1.75=1
• 11 years agoHelpfull: Yes(10) No(18)
• there is two series 7,6,4.5,2.25 and 4,3,1.5,-0.75
  7-6=1; 4-3=1;
  6-4.5=1.5; 3-1.5=1.5;
  4.5-2.25=2.25; 1.5-(-0.75)=2.25;
  now 1,1.5,1.5^2,1.5^3....
  then next term might be 2.25-(1.5^3)=-1.125
  
• 11 years agoHelpfull: Yes(9) No(0)
• the ans will be 1
  
  4-7=-3
  6-4=2
  3-6=-3
  4.5-3=1.5
  1.5-4.5=-3
  2.25-1.5=0.75
  -0.75-2.25=-3
  
  
  so,we get -3 alternately for 1st,3rd, substraction and for a second series
  2,1.5,0.75
  
  2-1.5=0.5
  1.5-0.75=0.75
  for each case 0.25 is added. so for last case. the difference is
  0.75+0.25=1
  
  let the last term is x;
  so, x-(-0.75)=1
  so,x=1-0.75=0.25
  so the last term is 0.25.
• 11 years agoHelpfull: Yes(1) No(1)
• s d ans .75?
• 11 years agoHelpfull: Yes(1) No(0)
• correct answer please
  
• 8 years agoHelpfull: Yes(0) No(0)
• 7-4=3 4-6=-2
  6-3=3 3-4.5=-1.5
  4.5-1.5=3 1.5-2.25=-0.75
  2.25-0.75=3 0.75-0.50=0.25
  Ans is 0.50
• 8 years agoHelpfull: Yes(0) No(0)