a^x + a^-x ????

• a^x+a^-x=
  a^x+1/a^x
  a^2x+1/a^x
• 11 years agoHelpfull: Yes(0) No(0)
• =a^x+(1/a^x)
  =((a^2x)+1)/a^x
  put x=0
  =(a^0+1)/a^0
  =2
• 11 years agoHelpfull: Yes(0) No(0)