f(0)=f(0)平方,解f(0)=0或1但若f(0)=0则所f(x)=0,则f(0)=1
f(-2)=f(-1-1)=f(-1)平方
f(an+1)=1/f(-2-an)=1/[f(-2)f(an)f(-1)]
f(an+1)f(an)=1/f(-1)立方
f(a2)f(0)=1/f(-1)立方
f(a2))=1/f(-1)立方
则当序数为奇数时为1;当序数为偶数时为1/f(-1)立方
答案=1
f(0)=f(0)平方,解f(0)=0或1但若f(0)=0则所f(x)=0,则f(0)=1
f(-2)=f(-1-1)=f(-1)平方
f(an+1)=1/f(-2-an)=1/[f(-2)f(an)f(-1)]
f(an+1)f(an)=1/f(-1)立方
f(a2)f(0)=1/f(-1)立方
f(a2))=1/f(-1)立方
则当序数为奇数时为1;当序数为偶数时为1/f(-1)立方
答案=1