3A=3/2.5+3/5.8+3/8.11+...+3/95.98
3A= 1/2-1/5+1/5-1/8+1/8-1/11+...+1/95-1/98
3A-A=1/2-1/98
2A=24/49
A=(24/49)/2
A=12/49
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Các câu hỏi tương tự
A=1/2.5+1/5.8+1/8.11+...+1/92.95+1/95.98
A=1/2.5+1/5.8+1/8.11+......+1/92.95+1/95.98
\(A=\dfrac{1}{2.5}+\dfrac{1}{5.8}+\dfrac{1}{8.11}+...+\dfrac{1}{92.95}+\dfrac{1}{95.98}\)
A=1/2.5+1/5.8+1/8.11+.....+1/92.95+1/95.98
A=?
A= 1/2.5+1/5.8+1/8.11+...+1/92.95+1/95.98.
Tính tổng A
Tìm A :
A=1/2.5+1/5.8+1/8.11+............+1/92.95+1/95.98
A= 1/2.5+1/5.8+1/8.11+...+1/92.95+1/95.98.
Tính tổng A?
Tính: A = \(\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}+....+\frac{1}{92.95}+\frac{1}{95.98}\)
Bài 5: (0,5 điểm) Tính giá trị biểu thức \(A=\dfrac{1}{2.5}+\dfrac{1}{5.8}+\dfrac{1}{8.11}+...+\dfrac{1}{92.95}+\dfrac{1}{95.98}\)