\(\dfrac{5}{2\cdot1}+\dfrac{4}{1\cdot11}+\dfrac{3}{11\cdot2}+\dfrac{13}{15\cdot4}\\ =\dfrac{5}{2}+\dfrac{4}{11}+\dfrac{3}{22}+\dfrac{13}{60}\\ =\dfrac{193}{60}\)
\(\dfrac{-1}{20}\)+\(\dfrac{-1}{30}\)+\(\dfrac{-1}{42}\)+\(\dfrac{-1}{56}\)+\(\dfrac{-1}{72}\)+\(\dfrac{-1}{90}\)=
\(\dfrac{5}{2.1}\)+\(\dfrac{4}{1.11}\)+\(\dfrac{3}{11.2}\)+\(\dfrac{1}{2.15}\)+\(\dfrac{13}{15.4}\)=
cíu mình 2 bài này với mình ko biết làm
5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
B = 5/2.1 + 4/1.11 + 3/11.2 + 1/2.5 + 13/15.4
tính A=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
C=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
Tính nhanh
B=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
tính B= 5/2.1 + 4/1.11 + 3/11.2 + 1/2.15 + 13/15.4
hép miii
Không quy đồng hãy tínhcác tổng sau : 5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
Giải hộ minh với:
B=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
