Question

cum se rezolva 3,4,5 va rogggggggggggvggv

Answer 1

3.$3 ^{x+3} +3 ^{x+2} -3 ^{x+1} =315$

$3 ^{x+1} (3 ^{2} +3-1)=315$

$3 ^{x+1} (3 ^{2} +3-1)=315$

$3 ^{x+1} *11=3 ^{2}*5*7$

$3 ^{x+1} = \frac{3 ^{2}*5*7 }{11}$
De,aici,nu-mi,mai,da...

4.$8^{23} =(2 ^{3) ^{23} } =2 ^{69}$
$16 ^{17} =(2 ^{4} ) ^{17} =2 ^{68}$
$=\ \textgreater \ 8 ^{23} \ \textgreater \ 16 ^{17}$