Equações exponenciais :
5 ^x+3 = 1
2 ^x-9 = 1
1/ 9^x = √27
3 ^ x²-3 = 3
7 ^3x+7 = 7
5 ^x+3 = 1
2 ^x-9 = 1
1/ 9^x = √27
3 ^ x²-3 = 3
7 ^3x+7 = 7
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A) 5^(x+3) = 15^(x+3) = 5^0
x+3 = 0
x = -3
b) 2^(x-9) = 1
2^(x-9) = 2^0
x-9 = 0
x = 9
c) 1/9^x = √27
9^(-x) = 27^(1/2)
3^(-2x) = 3^(3/2)
-2x = 3/2
x = (3/2) / (-2)
x = -3/4
d) 3^(x²-3) = 3¹
x²-3=1
x² = 4
x = + ou - 2
e) 7^(3x+7) = 7¹
3x+7 = 1
3x = 1-7
3x = -6
x = -6/3
x = -2