so sanh A=\(\frac{1}{41}+\frac{1}{42}+\frac{1}{43}+...+\frac{1}{80}\)va B=\(\frac{7}{12}\)
so sanh
a)\(\frac{-18}{91}\)va\(\frac{-23}{114}\)
b)\(\frac{-22}{35}\)va\(\frac{-103}{117}\)
1;so sánh :
a, 31/40 và 186/241
b, 41/91 và 411/911
2; CMR : 50 < B = 1 + 1/2 + 1/3 + ... + 1/210-1 < 100
giúp mình nha 0 _ 0 >_<
BT1: So sanh
\(\frac{-13}{39}va-\frac{21}{63}\)
\(\frac{1}{234567}va-\frac{2}{14}\)
BT2: So sanh
\(\frac{-39}{65}va-\frac{21}{35}\)
\(\frac{1}{2012}va-\frac{1}{14}\)
so sanh cac so huu ti sau bamg cach hop li
a,\(\frac{-22}{35}\)va\(\frac{-103}{177}\) b,\(\frac{-17}{23}\)va\(\frac{-25}{31}\) c,\(\frac{-18}{91}\)va\(\frac{-23}{114}\)
d,\(\frac{-27}{35}\)va\(\frac{-21}{40}\) e,\(\frac{-22}{45}\)va\(\frac{-17}{33}\)
so sanh
a)-22/45 va -51/101
b)so sanh A=\(\frac{^{2009^{2009}}+1}{^{2009^{20010}}+1}\)va B=\(\frac{2009^{2010}-2}{2009^{2011}-2}\)
so sanh\(\frac{-2015}{-2016}va\frac{-2016}{-2017}\)
so sanh\(\frac{33}{131}va\frac{53}{217}\)
so sanh
\(\frac{-2015}{2016}va\frac{-2016}{2017}\)