Các câu hỏi tương tự
Tính nhanh
A=111/110+91/90+73/72+…………+21/20+13/12+7/6+3/2
\(\frac{3}{2}+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+...............+\frac{91}{90}+\frac{111}{110}\)
13/12+21/20+31/30+.+91/90+111/110
3/2+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90
3/4+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90+111/110 help me!
3/2+ 7/6 + 13/12 + 21/20 +31/30 + 42/41+ 57/56+ 73/71+ 91/90. mọi ng cho mình lời giải chi tiết vs ạ.
tính :\(\frac{3}{2}+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}\)
A=3/2+7/6+13/12+...91/90
Tính nhanh tổng:
a, S=1 - 1/5 +7/12 -9/20 + 11/30 - 13/42 + 15/56 + 19/90 - 21/110 + 23/132
b, P=21 * (4/1*3 - 8/3*5 + 12/5*7 - 16/7*9 + ... + 36/17*19 - 40/19*21 ( dấu * là dấu nhân nhé)