Question

ex 2,3,5si sapte PLZ repedee

Answer 1

3.a) n^7 : n^ 3 = (-5)^4
n^(7-3) = (-5)^4
n^4 = (-5)^4
n = -5
b) (n^(7))^(3) = (-5)^21
n^(7*3) = (-5)^21
n^21 = (-5)^21
n= -5
c) (n^(9))^(5) = (-7)^45
n^(9*5) = (-7)^45
n^45 = (-7)^45
n= -7

2. a) n= 3/2 folosesti aceeasi rezolvare
b) n=3
c) n= 5/2
d) n=3

5. a) 3x+5-2(x+2)=8-3(1-x)
3x+5-2x-4=8-3+3x
-2x=4
2x=-4
x=-2

b) 3(2x+1)-4(x+3)=5-2(2x+1)
6x+3-4x-12=5-4x-2
6x=12
x=2