Jawab:
2^x + 2^ - 3
( 2^x + 2^ - x ) = 3^2
2^( 2x ) + 2 . 2^ - x + 2^ ( - 2 x )
= 9
4^x + 2 + 4^-x
4^x + 4^-x
= 9 - 2
= 7 ( C )
Jadi, jawabannya 7 yang ( C ) ...
Semoga membantu:) ^_^
Penjelasan dengan langkah-langkah:
2ˣ + 2⁻ˣ = 3
(2ˣ + 2⁻ˣ)² = 3²
(2ˣ)² + 2 . 2ˣ . 2⁻ˣ + (2⁻ˣ)² = 9
4ˣ + 2 + 4⁻ˣ = 9
4ˣ + 4⁻ˣ = 9 - 2
4ˣ + 4⁻ˣ = 7
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Jawab:
2^x + 2^ - 3
( 2^x + 2^ - x ) = 3^2
2^( 2x ) + 2 . 2^ - x + 2^ ( - 2 x )
= 9
4^x + 2 + 4^-x
= 9
4^x + 4^-x
= 9 - 2
4^x + 4^-x
= 7 ( C )
Jadi, jawabannya 7 yang ( C ) ...
Semoga membantu:) ^_^
Jawab:
Penjelasan dengan langkah-langkah:
2ˣ + 2⁻ˣ = 3
(2ˣ + 2⁻ˣ)² = 3²
(2ˣ)² + 2 . 2ˣ . 2⁻ˣ + (2⁻ˣ)² = 9
4ˣ + 2 + 4⁻ˣ = 9
4ˣ + 4⁻ˣ = 9 - 2
4ˣ + 4⁻ˣ = 7