設正數a,小數b 且a+b的平方等於n n為整數 求b是?

2015-09-09 1:42 pm

回答 (1)

2015-09-10 7:16 am
(a + b)² = n
a + b = √n
b = √n - a
例如 a=1,n=3,則 b=0.73205


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