=1/3(3/2*5+3/5*8+...+3/95*98)
=1/3(1/2-1/5+1/5-1/8+...+1/95-1/98)
=1/3*48/98
=1/3*24/49
=8/49
Đúng 2
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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.
Tính tổng A
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
tính 1/2.5+1/5.8+1/8.11+....+1/92.95+1/95.98
mong các bạn giải gúi mình mình đang gấp
b=1/2.5+1/5.8+1/8.11+...+1/92.95
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=?
Tìm A :
A=1/2.5+1/5.8+1/8.11+............+1/92.95+1/95.98