\(=\frac{1}{2}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+....+\frac{1}{95}-\frac{1}{98}\)
\(=\frac{1}{2}-\frac{1}{98}\)tự làm tiếp
\(=\frac{1}{2}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+....+\frac{1}{95}-\frac{1}{98}\)
\(=\frac{1}{2}-\frac{1}{98}\)tự làm tiếp
A= 1/2.5+1/5.8+1/8.11+...+1/92.95+1/95.98.
Tính tổng 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
A=?
A=1/2.5+1/5.8+1/8.11+......+1/92.95+1/95.98
\(A=\dfrac{1}{2.5}+\dfrac{1}{5.8}+\dfrac{1}{8.11}+...+\dfrac{1}{92.95}+\dfrac{1}{95.98}\)
Tìm A :
A=1/2.5+1/5.8+1/8.11+............+1/92.95+1/95.98
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 \(A=\dfrac{1}{2.5}+\dfrac{1}{5.8}+\dfrac{1}{8.11}+...+\dfrac{1}{92.95}+\dfrac{1}{95.98}\)
A=1/2.5+1/5.8+1/8.11+...+1/92.95+1/95.98