Find the reminder when x + x^3 + x^9 + x^27 + x^81 + x^243 is divided by (x^2 –1 )
a.6x b.4x c.6x+1 d.4x+1

• 6x
  
  x + x^3 + x^9 + x^27 + x^81 + x^243 = f(x)*(x^2-1) +ax+b
  putting x=1 and x=-1
  and
  solving eqns, we get a=6 and b=0
  so remainder = 6*x+0=6x
• 12 years agoHelpfull: Yes(2) No(1)