tinh gia tri bieu thuc a = \(\frac{1}{1\times2}+\frac{1}{1\times2}+...+\frac{1}{99\times100}\)
Tinh gia tri bieu thuc: A=\(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
\(A=\frac{1}{1x2}+\frac{1}{2x3}+...+\frac{1}{99.100}\)
\(A=\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(A=\frac{1}{1}-\frac{1}{100}=\frac{99}{100}\)
\(A=\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
\(A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(A=1-\frac{1}{100}\)
\(A=\frac{99}{100}\)
\(\Rightarrow A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+....+\frac{1}{99}-\frac{1}{100}\)
\(\Rightarrow A=1-\frac{1}{100}\)
\(\Rightarrow A=\frac{99}{100}\)
Tinh gia tri bieu thuc: A = \(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
\(A=\frac{1}{1x2}+\frac{1}{2x3}+...+\frac{1}{99x100}\)
\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(=1-\frac{1}{100}\)
\(=\frac{99}{100}\)
tinh gia tri cua bieu thuc \(\frac{1}{1\times2}+\frac{1}{2\times3}+........+\frac{1}{99\times100}\)
\(\frac{1}{1x2}+\frac{1}{2x3}+...+\frac{1}{99x100}=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}=1-\frac{1}{100}=\frac{99}{100}\)
tinh gia tri bieu thuc a=\(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
Tinh gia tri bieu thuc: A =\(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
1/1×2 + 1/2×3 + ... + 1/99×100
= 1 - 1/2 + 1/2 - 1/3 + ... + 1/99 - 1/100
= 1 - 1/100
= 99/100
Ủng hộ mk nha ♡_♡
1/1 NHÂN 2+1/1 NHÂN 3 + ... + 1/99 NHÂN 100
=1-1/2 + 1/2 -1/3 + ... +1/99-1/100
=1 - 1/100
=99/100
NHỚ K MK NHA CÁC BN CŨNG ỦNG HỘ NHÉ
tinh gia tri bieu thuc a =\(\frac{1}{1\times2+\frac{1}{2\times3+...+\frac{1}{99\times100}}}\)
tinh gia tri bieu thuc a =\(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
\(A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(A=1-\frac{1}{100}\)
\(A=\frac{99}{100}\)
A=\(\frac{1}{1x2}+\frac{1}{2x3}+.......+\frac{1}{99x100}\)
A=\(\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+.......+\frac{1}{99}-\frac{1}{100}\)
A=\(1-\frac{1}{100}\)
A= \(\frac{99}{100}\)
\(A=\frac{1}{1\cdot2}+\frac{1}{2\cdot3}+.......+\frac{1}{99\cdot100}\)
\(\Rightarrow A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(\Rightarrow A=1-\frac{1}{100}\)
\(\Rightarrow A=\frac{100}{100}-\frac{1}{100}=\frac{99}{100}\)
tinh gia tri bieu thuc a =\(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
tinh gia tri bieu thuc a = \(\frac{1}{1\times2}+\frac{1}{2\times3}+...+\frac{1}{99\times100}\)
\(a=\frac{1}{2\times3}+\frac{1}{2\times3}+....+\frac{1}{99\times100}\)
\(a=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}+...+\frac{1}{99}-\frac{1}{100}\)
\(a=1-\frac{1}{100}\)
\(\frac{99}{100}\)