Question

help!(2+1)(2^2-1)(2^4+1).(2^32+1)等于多少?(2^2是2的平方)已知a+1/a=10,求

Answer 1

(2+1)(2^2+1)(2^4+1).(2^32+1)

=(2-1)(2+1)(2^2+1)(2^4+1)...(2^32+1)

=(2^2-1)(2^2+1)(2^4+1)...(2^32+1)

=.

=(2^32-1)(2^32+1)

=2^64-1

a+1/a=10

[a-1/a]^2=[a+1/a]^2-4=10*10-4=96

a-1/a=+/-根96=+/-4根6