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9796/9797*9798/9898*98/97
=9796/9797*9798/97
=9796*9798/9797*97
=100,999999999999999999999999999999999.....
\(...=\left(9797+1\right).9897-9797.\left(9897+1\right)\)
\(=9797.9897+9897-9797.9897-9797\)
\(=9897-9797=100\)
\(15-\frac{15}{7}-\frac{15}{12}-\frac{1}{98}\)
\(=15\left(1-\frac{1}{7}-\frac{1}{12}-\frac{1}{98}\right)\)
\(=15x\frac{449}{588}=\frac{2245}{196}\)
\(18-\frac{18}{7}-\frac{18}{12}-\frac{18}{98}\)
\(=18\left(1-\frac{1}{7}-\frac{1}{12}-\frac{1}{98}\right)\)
\(=18x\frac{449}{588}=\frac{1347}{98}\)
\(A=\frac{1+\left(1+2\right)+\left(1+2+3\right)+...+\left(1+2+...+98\right)}{1.98+2.97+3.96+...+97.2+98.1}\)
\(A=\frac{1.98+2.97+3.96+...+98.1}{1.98+2.97+3.96+...+98.1}=1\)
\(11\frac{5}{8}+\frac{69}{27}+4\frac{3}{8}+\frac{59}{18}\)
\(=11\frac{5}{8}+\frac{23}{9}+4\frac{3}{8}+\frac{59}{18}\)
\(=11\frac{45}{72}+\frac{184}{72}+4\frac{27}{72}+\frac{236}{72}\)
\(=\left(11+4\right)+\left(\frac{45+184+27+236}{72}\right)\)
\(=15+\frac{123}{12}\)
\(=15+10\frac{1}{4}\)
\(=25\frac{1}{4}\)
Mk k chắc nha
9796/9797 + 9798/9898 : 97/98 = 9796/9897 + 1 : 97/98
= 9796/9797 + 98/97
= 9796/9797 + 1 + 1/97
= 1 + 9796/9797 + 1/97
= 1 + 9897/9797
= 1 + 1 + 100/9897
= 2 100/9897
ak nhầm để mk trình bày lại cho
9796/9797 + 9798/9898 : 97/98 = 9796/9797 + 1 : 97/98
= 9796/9797 + 98/97
= 9796/9797 + ( 1 + 1/97 )
= 9796/9797 + ( 97 + 101/9797 )
= 97 + ( 101/9797 + 9796/9797 )
= 97 + 9897/9797
= 97 + 1 + 100/9797
= 98 100/9797