Ответ:
4) x = -3
5) x = 1 1/4 или 1,25
Объяснение:
==================
4) 3^x = 1/27
3^x = 3^-3
x = -3
------------------------------
5) 4^2 - x = √8
(2^2)^2 - x = 2^(3/2)
2^4 - 2x = 2^(3/2)
4 - 2x = 3/2
-2x = 3/2 - 4
-2x = -2,5
x = -2,5 / -2
x = 1 1/4 или 1,25
№4
3^х = 1/27
3^х = 3-³
х = -3
№5
4^(2 - х) = √8
4^(4 - 2х) = 2^(3/2)
4 - 2х = 3/2
2х = 4 - 3/2
2х = 4 - 1,5
2х = 2,5
х = 2,5 : 2
х = 1,25
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Ответ:
4) x = -3
5) x = 1 1/4 или 1,25
Объяснение:
==================
4) 3^x = 1/27
3^x = 3^-3
x = -3
------------------------------
5) 4^2 - x = √8
(2^2)^2 - x = 2^(3/2)
2^4 - 2x = 2^(3/2)
4 - 2x = 3/2
-2x = 3/2 - 4
-2x = -2,5
x = -2,5 / -2
x = 1 1/4 или 1,25
==================
Verified answer
Объяснение:
№4
3^х = 1/27
3^х = 3-³
х = -3
№5
4^(2 - х) = √8
4^(4 - 2х) = 2^(3/2)
4 - 2х = 3/2
2х = 4 - 3/2
2х = 4 - 1,5
2х = 2,5
х = 2,5 : 2
х = 1,25