Các câu hỏi tương tự
S = 99 – 97 + 95 – 93 + 91 – 89 + ….+11 – 9 + 7 – 5 + 3 – 1S = 99 – 97 + 95 – 93 + 91 – 89 + ….+11 – 9 + 7 – 5 + 3 – 1
1-3+5-7+9-11+...+91-93+95-97+99
99−97+95−93+91−89+⋯+7−5+3−1
99-97+95-93+91-89+......+7-5+3-1
A=99-97+95-93+91-89+....+7-5+3-1=?
99-97+95-93+91-89+.......+7-5+3-1
99-97+95-93+91-89+...+7-5+3-1
99-97+95-93+91-89+.....+7-5+3-1 = ?
99-97+95-93+91-89+...+7-5+3-1= ?