1) 12⁻²=1/(12²)=1/144;
2) 3⁻⁴=1/3⁴=1/81;
3) (-2)⁻⁶=1/2⁶=1/64;
4)(-5)⁻³=1/(-5)³=-1/125
5)(-1/8)⁻¹=1/(-1/8)=-8
6) (2/3)⁻³=(3/2)³=27/8=3 3/8
7) (-7/9)⁻²=81/49=1 39/49
8) (1 2/3)⁻¹=(5/3)⁻¹=3/5
9)0.3⁻²=1/0.3²=1/0.09=100/9=11 1/9
Найдите значение выражения:
1) 5⁻³ +10⁻²=1/25+1/100=5/100=1/20;
2) (3/8)⁻¹+3⁻²-(-2.6)⁰=8/3+1/9-1=(25/9)-9/9=16/9=1 7/9
3) (/2/3)⁻³*9⁻²=(3/2)³*(1/(9)²)=27*1/(8*81)=1/24
1) 12⁻²=1/(12²)=1/144;
2) 3⁻⁴=1/3⁴=1/81;
3) (-2)⁻⁶=1/2⁶=1/64;
4)(-5)⁻³=1/(-5)³=-1/125
5)(-1/8)⁻¹=1/(-1/8)=-8
6) (2/3)⁻³=(3/2)³=27/8=3 3/8
7) (-7/9)⁻²=81/49=1 39/49
8) (1 2/3)⁻¹=(5/3)⁻¹=3/5
9)0.3⁻²=1/0.3²=1/0.09=100/9=11 1/9
Найдите значение выражения:
1) 5⁻³ +10⁻²=1/25+1/100=5/100=1/20;
2) (3/8)⁻¹+3⁻²-(-2.6)⁰=8/3+1/9-1=(25/9)-9/9=16/9=1 7/9
3) (/2/3)⁻³*9⁻²=(3/2)³*(1/(9)²)=27*1/(8*81)=1/24