Cálculos
1) Calcule
a) 7² = (R:49)
b) 4² = (R: 16)
c) 2⁵ = (R: 32)
d) 8¹ = (R: 8)
e) 9⁰ = (R: 1)
f) (-9)² = (R: 81)
g) (-5)³ = (R: -125)
h) (-1)⁷ = (R: -1)
i) (-15)¹ = (R: -15)
j) (-10)⁰ = (R: 1)
k) (+3)⁴ = (R: 81)
l) (-1)⁵⁶ = (R: 1)
m) (-10)⁵ = (R: -100000)
2) Calcule:
a) 2⁵ = (R: 32)
b) (-2)⁵ = (R: -32)
c) -2⁵ = (R: -32)
d) 2⁴ = (R: 16)
e) (-2)⁴ = (R: 16)
f) -2⁴ = (R: -16)
g) –(-3)⁴ = (R: -81)
h) –(-5)³ = (R: 125)
i) –(+2)⁶ = (R: -64)
3) Calcule:
a) (3/2)² = (R: 9/4)
b) (-1/2)⁴ = (R: 1/16)
c) (-1/3)³ = (R: (-1/27))
d) (-4/5)⁰ = (R: 1)
e) (-5/9)¹ = (R: (-5/9))
f) (+7/8)¹ = (R: 7/8)
g) (-1/2)⁵ = (R: (-1/32))
h) (-4/3)² = (R: 16/9)
4)Calcule:
a) 7⁻² = (R: 1/49)
b) 5⁻³ = (R: 1/125)
c) 2⁻⁴ = (R: 1/16)
d) 2⁻⁵ = (R: 1/32)
e) (-3)⁻² = (R: 1/9)
f) –(-3)⁻² = (R: (-1/9))
5)Calcule:
a) (3/2)⁻² = (R: 4/9)
b) (1/2)⁻³ = (R: 8)
c) (2/3)⁻² = (R: 9/4)
d) (-1/4)⁻² = (R: 16)
e) (5/2)⁻³ = (R: 8/125)
f) (-1/2)⁻⁴ = (R: 16)
6 Calcule:
a) (-4)² - 3 = (R: 13)
b) 1 + (-2)³ = (R: -7)
c) -2 + (-5)² = (R: 23)
d) 15 + (-1)⁷ -2 = (R: 12)
e) (-2)² + (-3)³ +1 = (R: -22)
f) (-9)² -2 –(-3) -6 = (R: 76)
g) (-2) . (-7) + (-3)² = (R: 23)
h) (-1)³ + 3 + (-2) . (-5) = (R: 12)
7) Calcule o valor das expressões:
a) (-4/3)² - 1 = (R: 7/9)
b) 3/2 + (-1/2)² -8 = (R: (-25/4))
a) (1 - ½)² + (-1 + ½)³ = (R: 1/8)
b) (1 + ½)² - ¼ = (R: 2)
EXERCÍCIOS
1) Classifique como verdadeiro ou falso:
a) 5⁷ . 5² = 5⁹ (v)
b) 3⁹ : 3⁴ = 3⁵ (v)
c) 8⁵ : 8⁻³ = 8² (f)
d) 7⁵ – 7³ = 7² (f)
e) 7⁶⁻⁵ = 7⁶ / 7⁵ (v)
f) (7³)² = 7⁵ (f)
g) ( 5 + 2 )² = 5² + 2² (f)
h) 3² + 3³ + 3⁵ = 3¹⁰ (f)
2) Simplifique, aplicando a propriedades de potência:
a) (3 . 7)⁵ . ( 3 .7 )² = (R: 3⁷ . 7⁷)
b) (5xy²) . (2x²y³) = (R: 10x³y⁵)
c) ( a² . b)² . (a . b)³ = (R: a⁷ . b⁵)
d) (7xy²)² . (x³y²)⁴ = (R: 49x¹⁴y¹²)
3) Calcule:
a) (-3)² + 6² = (R: 45)
b) 3² + (-5)² = (R: 34)
c) (-2)³ - (-1)³ = (R: -7)
d) 5² - 3⁴ - (-1)⁹ = (R: -55)
e) (-10)² -