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(a-1/a)的值.(1/a是a分之1)(请务必说清楚理由,
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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(a-1/a)的值.(1/a是a分之1)(请务必说清楚理由,help!(2+1)
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(a-1/a)的值.(1/a是a分之1)(请务必说清楚理由,
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(a-1/a)的值.(1/a是a分之1)
(请务必说清楚理由,
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(a-1/a)的值.(1/a是a分之1)(请务必说清楚理由,
(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
1.2^64-1
2.-8
第一题:
考察点为公式a^2-b^2=2ab,所以在开头可以自己补上一个(2-1),这样就可以一直乘下去直到(2^32-1)*(2^32+1),所以答案是2^64-1
2.a+1/a=10
[a-1/a]^2=[a+1/a]^2-4=10*10-4=96
a-1/a=正负4倍sqrt6
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