Question

срочно !!!!!!!!!!!!!​

Answer 1

Объяснение:

1 — Б

2 — Б

3 — В

4.

х=5

(х⁵•х`¹⁰)/х`³=х`²=5`²=1/5²=1/25

4 — Г

1.

a)

3 1/2•m`⁸•n`⁷:(-7/8•m`⁵•n⁷)=

= 7/2•m`⁸•n`⁷:(-7/8•m`⁵•n⁷)=

= -4•m`³•n`¹⁴= -4/(m³n¹⁴)

б)

21а`⁴/10b⁶ •5b`⁶/7a`⁸=

=3/2•a⁴•b`¹²=3a⁴/2b¹²

в)

4/7•m⁷:(1 3/4•m`³)=4/7•m⁷:(7/4•m`³)=

=16/49•m¹⁰=16m¹⁰/49

2.

a)

(x⁴+x⁷)/(x`²+x)=(x⁶(x`²+x))/(x`²+x)=x⁶

б)

(у⁵+у¹²)/(у`⁶+у)=(у¹¹(у`⁶+у))/(у`⁶+у)=у¹¹

в)

(а`¹+с`¹)/(а+с)=

=(1/а+1/с)/(а+с)=((с+а)/ас)/(а+с)=

=(с+а)/ас •1/(а+с)=1/ас

3.

а)

(2`⁵•2`⁶)/2`¹⁰=2`¹¹/2`¹⁰=2`¹=1/2=0,5

б)

(3¹²•3`¹⁵)/(3`¹⁰•81)=3`³/(3`¹⁰•3⁴)=3`³/3`⁶=

=3³=27

в)

(2`⁸•5`⁸)/10`⁹=(2•5)`⁸/10`⁹=10`⁸/10`⁹=10¹=10

г)

(3`⁵⁰•81•2`²³)/18`²³=3`⁵⁰•3⁴•2`²³•18²³=

=3`⁵⁰•3⁴•2`²³•(2•3²)²³=

=3`⁵⁰•3⁴•2`²³•2²³•3⁴⁶=3⁰•2⁰=1•1=1