Calcule :
A) 9^1/2
B) 400^1/2
C) (16/25)1/2
D) (8/27)^1/3
Soluções para a tarefa
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3
Calcule :
A) 9^1/2
9¹/₂ ( 9 = 3x3 = 3²)
(3²)¹/₂ ( potencia de potencia ( Multiplica expoentes)
3²(¹/₂)
3²ˣ¹/₂
3²/₂
3¹ = 3 ( resposta)
B) 400^1/2
400¹/₂
fatora
400| 2
200| 2
100| 2
50| 2
25| 5
5| 5
1/
= 2.2.2.2.5.5
= 2². 2². 5² mesmo expoentes
= (2.2.5)²
= (20)²
= 400¹/₂
=(20²)¹/₂ idem acima
20²ˣ¹/₂
20²/₂ =
20¹ = 20 ( resposta)
C) (16/25)1/2
(16/25)¹/₂ ( 16 = 4x4 = 4²) e (25 = 5x5 = 5²)
(4²/5²)¹/₂
((4/5)²)¹/₂ idem acima
4/5²ˣ¹/₂
4/5²/₂
4/5¹ = 4/5 ( resposta)
D) (8/27)^1/3
(8/27)¹/₃ ( 8 = 2x2x2 = 2³) e (27 = 3x3x3 = 3³)
(2³/3³)¹/₃
((2/3)³)¹/₃
2/3³ˣ¹/₃
2/3³/₃
2/3¹ = 2/3 ( resposta)
A) 9^1/2
9¹/₂ ( 9 = 3x3 = 3²)
(3²)¹/₂ ( potencia de potencia ( Multiplica expoentes)
3²(¹/₂)
3²ˣ¹/₂
3²/₂
3¹ = 3 ( resposta)
B) 400^1/2
400¹/₂
fatora
400| 2
200| 2
100| 2
50| 2
25| 5
5| 5
1/
= 2.2.2.2.5.5
= 2². 2². 5² mesmo expoentes
= (2.2.5)²
= (20)²
= 400¹/₂
=(20²)¹/₂ idem acima
20²ˣ¹/₂
20²/₂ =
20¹ = 20 ( resposta)
C) (16/25)1/2
(16/25)¹/₂ ( 16 = 4x4 = 4²) e (25 = 5x5 = 5²)
(4²/5²)¹/₂
((4/5)²)¹/₂ idem acima
4/5²ˣ¹/₂
4/5²/₂
4/5¹ = 4/5 ( resposta)
D) (8/27)^1/3
(8/27)¹/₃ ( 8 = 2x2x2 = 2³) e (27 = 3x3x3 = 3³)
(2³/3³)¹/₃
((2/3)³)¹/₃
2/3³ˣ¹/₃
2/3³/₃
2/3¹ = 2/3 ( resposta)
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