(1+2的-1/4次方)(1+2的-1/2次方)(1+2的-1次方)
=(1-2的-1/4次方)(1+2的-1/4次方)(1+2的-1/2次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-1/2次方)(1+2的-1/2次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-1次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-2次方)÷(1-2的-1/4次方)
=4分之3÷(1-2的-1/4次方)
(1+2的-1/4次方)(1+2的-1/2次方)(1+2的-1次方)
=(1-2的-1/4次方)(1+2的-1/4次方)(1+2的-1/2次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-1/2次方)(1+2的-1/2次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-1次方)(1+2的-1次方)÷(1-2的-1/4次方)
=(1-2的-2次方)÷(1-2的-1/4次方)
=4分之3÷(1-2的-1/4次方)