\(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}+\frac{8}{609}\)
Những câu hỏi liên quan
a=\(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}+\frac{8}{609}+\frac{13}{1218}\)
a = 3/54 + 5/126 + 7/294 + 8/609 + 13/1218
=> a = 3/6.9 + 5/9.14 + 7/14.21 + 8/21.29 + 13/29.42
=> a = 1/6 - 1/9 + 1/9 - 1/14 + 1/14 - 1/21 + 1/21 - 1/29 + 1/29 - 1/42
=> a = 1/6 - 1/42
=> a = 7/42 - 1/42
=> a = 6/42 = 1/7
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A=3/54+5/126+7/294+8/609
A=3/54+5/126+7/294+8/609
=1/18+5/126+1/42+8/609
=2/21+15/406
=23/174
tick cho mik nha
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A=3/54+5/126+7/294+8/609
A=3/54+5/126+7/294+8/609
=1/18+5/126+1/42+8/609
=2/21+15/406
=23/174
tick cho mik nha
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3/54+5/126+7/294+8/609
tính bằng cách hợp lý
\(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}\) chia \(\frac{5}{24}+\frac{5}{104}+\frac{5}{234}\)
tính tổngS frac{4}{1+2}+frac{4}{1+2+3}+frac{4}{1+2+3+4}+...+frac{4}{1+2+3+...+100}Ofrac{1}{1x2}+frac{2}{2x4}+frac{3}{4x7}+frac{4}{7x11}+frac{5}{11x16}Xfrac{3}{54}+frac{5}{126}+frac{7}{294}+frac{8}{609}giúp mình nhaAi nhanh mình sẽ tick
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tính tổng
S= \(\frac{4}{1+2}\)+\(\frac{4}{1+2+3}\)+\(\frac{4}{1+2+3+4}\)+...+\(\frac{4}{1+2+3+...+100}\)
O=\(\frac{1}{1x2}\)+\(\frac{2}{2x4}\)+\(\frac{3}{4x7}\)+\(\frac{4}{7x11}\)+\(\frac{5}{11x16}\)
X=\(\frac{3}{54}\)+\(\frac{5}{126}\)+\(\frac{7}{294}\)+\(\frac{8}{609}\)
giúp mình nha
Ai nhanh mình sẽ tick
Tinh nhanh: \(\frac{3}{54}+\frac{5}{126}+\frac{7}{294}\)tren \(\frac{5}{24}+\frac{5}{104}+\frac{5}{234}\)
(Day la phan so, tu so la 3 ps dau, mau so la 3 ps sau).Giup mik voi.Thanks!!!
1/. A = 3/54 + 5/ 126 + 7/ 294 + 8/609
TÍNH BẰNG CÁCH THUẬN TIỆN NHẤT
A=\(\frac{3}{9.6}+\frac{5}{2.7.9}+\frac{7}{6.7.7}+\frac{8}{3.7.29}\) = \(\frac{1}{18}+\frac{5}{7.18}+\frac{1}{6.7}+\frac{8}{3.7.29}\)
= \(\frac{7+5}{7.18}+\frac{1}{6.7}+\frac{8}{3.7.29}\)=\(\frac{2}{7.3}+\frac{1}{6.7}+\frac{8}{3.7.29}\)= \(\frac{1}{3.7}.\)(\(\frac{2}{1}+\frac{1}{2}+\frac{8}{29}\))=
=\(\frac{1}{21}.\)(\(\frac{116+29+16}{58}\))=\(\frac{1}{21}.\frac{161}{58}=\frac{161}{1218}\)
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A = 3/54 + 5/126 + 7/294 + 8/609
TÍNH BẰNG CÁCH THUẬN TIỆN NHẤT
\(A=\frac{3}{54}+\frac{5}{126}+\frac{7}{294}+\frac{8}{609}\)
\(\Rightarrow A=\frac{3}{9.6}+\frac{5}{2.7.9}+\frac{7}{7.7.6}+\frac{8}{3.7.29}\)
\(\Rightarrow A=\frac{1}{18}+\frac{5}{7.18}+\frac{1}{6.7}+\frac{8}{3.7.29}\)
\(\Rightarrow A=\frac{7+5}{7.18}+\frac{1}{6.7}+\frac{8}{3.7.29}\)
\(\Rightarrow A=\frac{2}{7.3}+\frac{1}{6.7}+\frac{8}{3.7.29}\)
\(\Rightarrow A=\frac{1}{3.7}\left(\frac{2}{1}+\frac{1}{2}+\frac{8}{29}\right)\)
\(\Rightarrow A=\frac{1}{21}\left(\frac{116+29+16}{58}\right)\)
\(\Rightarrow A=\frac{1}{21}.\frac{161}{58}\)
\(\Rightarrow A=\frac{161}{1218}=\frac{23}{174}\)
Vậy \(A=\frac{23}{174}\)
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