Question

помогите пожалуйста, ребят ❤

Answer 1

$1)( - 1 \frac{1}{4} )^{2} = ( - \frac{5}{4} )^{2} = \frac{25}{16} = 1 \frac{9}{16} \\ 2) \frac{ {2}^{17} }{ {2}^{15} } = {2}^{2} = 4 \\ 3) \frac{ {9}^{8} }{ {3}^{16} } = \frac{ {3}^{16} }{ {3}^{16} } = 1$

Answer 2

1.

(-1  ¼)²=(-5/4)²=25/16 =  1  9/16

2.

 2^17  / 2^15 = 2^(17-15) =2²=4

3.

9^8 /3^16 =   (3^2)^8 / 3^16 = =3^(16-16) 3^0 =1

4.

(2  1/7)^5 * (7/5)^5 = (15/7)5 * (7/15)^5 =(15^5*7^5)  / ( 7^5*15^5)=1

5.a)

  3a³b *(-7ab^4)= -21a^4b^5

  b)

  (-2x³)² = 4x^6