Question

ma puteti ajuta va rog e urgentt​

Answer 1

Răspuns:

Explicație pas cu pas:

1)

¹⁰⁾2/15+¹⁵⁾3/10=20/30+45/30=65/30=13/6

2)

(5*6+1)/6-3/8=

⁴⁾31/6-³⁾3/8=

124/24-9/24=115/24

-

3)

14/25*15/49*(-10⁽¹⁰/20⁽¹⁰)=

14⁵/25⁽⁵*15⁽⁵/49

= simplificam 25 cu 15 prin 5 ....... si 10 cu 10 .....si 20 cu 10

= 14⁽⁷/5*3/49⁽⁷ *(-1/2)=

- 3/35

-

4)

(1/2)³*(2/5)²-3/5:2/50=

1/8⁽⁴*4⁽⁴/25-3/5⁽⁵*50⁽⁵/2=

2/50-30/2=

2/50-⁵⁰⁾15/1=

2/50-750/50=

- 748/50

-

5)

(2x+1)/7+(3x-1) /7=

(2x+1+3x-1 )/7=

se reduce 1 cu -1

=( 2x+3x)/7=

=5x/7

x= 5/7

-

6)

(⁴⁾x²/9-¹²⁾x²/3+ ⁹⁾x²/4) :x²/72=

(4x²/36-12x²/36+9x²/36) :x²/72=

(-8x²/36+9x²/36):x²/72=

x²/36*72/x²=

se simplifica x² cu x²......72 cu 36

= 72/36

=2

-

7)

(¹⁻ˣ⁾ 1/x+1+¹⁺ˣ⁾1/1-x) : 1/x²-1=

[(1-x+1+x )/ (x+1)( x-1) ]:1/x²-1=

se reduce -x cu +x

= 2/x²-1* x²-1/1=

se simplifica x²-1 cu ...x²-1

= 2/1

=2