а) 2^3-x = 12^3-x = 2^3-x = -x = x = -1
б) 3^(2x) + 7 = 9^(3x) + 19^x + 7 = 729^x + 19^x - 729^x = 15 - 720^x = 720^x = 2^5^x = x = log5(2)
в) log3(5x + 3) = log3(7x + 55x + 3 = 7x + 5 - 3 = 7x - 52 = 2x = 1
а) 2^3-x = 1
2^3-x = 2^
3-x =
-x =
x = -1
б) 3^(2x) + 7 = 9^(3x) + 1
9^x + 7 = 729^x + 1
9^x - 729^x = 15 -
720^x =
720^x = 2^
5^x =
x = log5(2)
в) log3(5x + 3) = log3(7x + 5
5x + 3 = 7x +
5 - 3 = 7x - 5
2 = 2
x = 1