Question

dau cea mai mare coroana ex 11 a si b

Answer 1

$a)8^{n+3}=512\\\\8^{n+3}=8^{3}\\\\n+3=3\\\\ n=3-3\\ \\ n=0$

$b)4^n+4^{n+1}=20 \\\\ 4^n+4*4^n=20 => 5*4^n=20 => 4^n=4 => n=1$

Answer 2

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