A=1/13.14+1/14.15+1/15.16+1/16.17=1/17.18+1/18.19
A=1/13-1/14+1/14-1/15+1/15-1/16+1/16-1/17+1/18-1/19
A=1/13-1/19
A=6/247
A=1/13.14+1/14.15+1/15.16+1/16.17=1/17.18+1/18.19
A=1/13-1/14+1/14-1/15+1/15-1/16+1/16-1/17+1/18-1/19
A=1/13-1/19
A=6/247
tính nhanh
A= 1 phần 182+1 phần 210 + 1 phần 240 + 1 phần 276 + 1 phần 306 + 1 phần 342
tính nhanh \(A=364-\)(\((\frac{364}{210}+\frac{334}{240}+\frac{302}{272}+\frac{268}{306}+\frac{232}{342}+\frac{194}{380})\)
Tính nhanh:
\(A=\left(\frac{364}{210}+\frac{334}{240}+\frac{302}{272}+\frac{268}{306}+\frac{232}{342}+\frac{194}{380}\right)\)
1.tính nhanh
A= 1/2+1/210+1/240+1/276+1/306+1/342
Tính nhanh:Cho A =364-(\(\frac{364}{210}\)+\(\frac{334}{240}\)+\(\frac{302}{272}\)+\(\frac{268}{306}\)+\(\frac{232}{342}\)+\(\frac{194}{380}\))
giúp mình nhanh lên nhé
Cho: \(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{307}+\frac{1}{308}+\frac{1}{309}\)
\(B=\frac{308}{1}+\frac{307}{2}+\frac{306}{3}+...+\frac{3}{306}+\frac{2}{307}+\frac{1}{308}\)
Tính \(\frac{A}{B}\)
Cố lên nha các bạn!!! Mình sẽ tick cho bạn nào tính nhanh nhất
\(B=\frac{191}{210}+\frac{161}{240}+\frac{129}{272}+\frac{95}{306}\)
tÍNH TỔNG
Tính Nhanh
A=\(\frac{1}{30}+\frac{1}{42}+\frac{1}{56}+\frac{1}{72}+...+\frac{1}{210}\)
Giúp mik nha
\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+....+\frac{1}{308}+\frac{1}{309}\)
\(B=\frac{308}{1}+\frac{307}{2}+\frac{306}{3}+....+\frac{3}{306}+\frac{2}{307}+\frac{1}{308}\)
Tính\(\frac{\:A}{B}\)