Răspuns:
Explicație pas cu pas:
1.
3^x+4 = 3^3
x + 4 = 3
x = 3 - 4 = -1
2.
9^x-1 = 3
3^2(x-1) = 3^1
2(x - 1) = 1
2x - 2 = 1
2x = 2 + 1 = 3
x = 3/2
3.
(1/2)^3-x = 2
2^x-3 = 2^1
x - 3 = 1
x = 3 + 1 = 4
4.
125^x+3 = 25
5^3(x+3) = 5^2
3(x+3) = 2
3x + 9 = 2
3x = 2 - 9 = -7
x = -7/3
1) 3^x+4=27
3^x+4=3^3=>x+4=3=>x=-1
2)9^x-1=3
3^2(x-1)=3^1
3^2x-2=3^1=>2x-2=1=>2x=3=>x=3/2
3)(1/2)^3-x=2
1/2=2^-1=>2^-1(3-x)=2^1
2^x-3=2^1=>x-3=1=>x=4
4)125^x+3=25
125=5^3
25=5^3
=>5^3(x+3)=5^2
=>5^3x+9=5^2=>3x+9=2=>3x=-7=>x=-7/3
