1/2⁰+1/2¹=1+1/2=2/2+1/2=3/2;
1/3⁰+1/3¹=1+1/3=3/3+1/3=4/3;
1/2¹-1/2²=²⁾1/2-1/4=2/4-1/4=1/4;
1/4⁰-1/4²=1-1/16=16/16-1/16=15/16.
ex5.
1/2²+1/3²=⁹⁾1/4+⁴⁾1/9= 9/36+4/36=13/36;
3/2²-1/4²=⁴⁾9/4-1/16=36/16-1/16=35/16=2intregi si 3/16;
5/3²-1/2³=⁸⁾25/9-⁹⁾1/8=200/72-9/72=191/72=2 intregi si 47/72;
5/4²+3/2³=25/16+²⁾27/8=25/16+54/16=79/16=4 intregi si 15/16.
ex6.
3/2⁷x3/2¹⁵=3/2²²;
7/3⁸x7/3¹¹=7/3¹⁹;
2/5⁶x2/5¹⁹=2/5²⁵.
Spor la scoala!
