【正文】
條件 1)假設(shè)是三個(gè)正數(shù)a,b,c 條件是:a+bc and b+ca and c+ab 2)假設(shè)是三個(gè)數(shù)a,b,c 條件是:a+bc and b+ca and c+ab and a0 and b0 and c0累加:求s=10+30+50+…+550 … S=0 For i=10 to 550 step 20 S=S+i NEXT i PRINT S拓展一: … S=0 For i=550 to 10 step 20 S=S+i NEXT i PRINT S拓展二:求s=