質問<26>98/7/2
(ΣAk)^2(k=1,2,・・・・・,n)はどうやって 計算するのでしょうか?
お返事98/7/3
from=武田
( )の中のΣAkを計算してから 2乗する しか手はないように思えます。
お便り98/7/6
from=Hideo Nakayama
I am a novice to personal computer; so I have some problem with using special character like sigma. If (Sigma Ak)**2 means (A1+A2+A3+...+An)**2, I think that the solution is given as shown below: (x**2 means x squared) S Ak**2 + 2*S S (Ai*Aj) where S stands for sigma, i.e., summation symbol. The first S is summation for k = 1 to n, the second S is for i = 1 to (n -1), the third S is for j = (i + 1) to n. What do you think of this solution? Hideo Nakayam