Question

preciso disso para hj

Answer 1

a) (3/4)²
3²/4²
9/16

b)(-1/2)⁴
(-1)⁴/2⁴
1/16

c)(-1/3)³
(-1)³/3³
-1/27

d)(-4/5)°
1

e) (-5/9)¹
-5/9

f)(7/8)¹
7/8

Answer 2

2) calcule:
$a)\ \big( \frac{3}{4} \big)^{2} = \frac{3}{4} \cdot \frac{3}{4} = \frac{9}{16} \\ \\b)\ \big(- \frac{1}{2} \big)^{4} = \big(- \frac{1}{2} \big)\cdot\big(- \frac{1}{2} \big)\cdot\big(- \frac{1}{2} \big)\cdot\big(- \frac{1}{2} \big) = \frac{1}{16} \\ \\c)\ \big(- \frac{1}{5} \big)^{3} = \big(- \frac{1}{3} \big)\cdot\big(- \frac{1}{3} \big)\cdot\big(- \frac{1}{3} \big)=- \frac{1}{27} \\ \\d) \ \big(- \frac{4}{3} \big)^{0} = 1\\ \\e)\ \big(- \frac{5}{9} \big)^{1} = - \frac{5}{9}$
$\\f)\ \big( \frac{7}{8} \big)^{1} = \frac{7}{8}$

3) Calcule:
$a)\ 7^{-2} =\big( \frac{1}{7} \big)^{2} =\frac{1}{7} \times\frac{1}{7} =\frac{1}{49}\\ \\b)\ (-1)^{-3} =\ig( -\frac{1}{1} \big)^3=(-1)^3=(-1)\times(-1)\times(-1)=-1$