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1/√4+√7=√7-√4/(√7+√4)(√7-√4)=√7-√4/7-4=√7-√4/3
itd
1/√97+√100=√100-√97/(√100+√97)(√100-√97)=√100-√97/100-97=√100-√97/3
toz
(√4-√1)/3+(√7-√4)/3+..+(√100-√97)/3=(√4-√1+√7-√4+...+√100-√97)/3=
=-√1+√100/3=-1+10/3=9/3=3
odpowiedz 3