Question

ребят срочно надо !!!!

Answer 1

1.
$2^{3x+4}- 2^{3x+1}=56$=$16* 2^{3x}- 2* 2^{3x}=56$=$2^{3x} *(16-2)=56$
$2^{3x}=4$=> $2^{3x}= 2^{2}$=>3x=2=>x=2/3

2.
f'(x)=$9 x^{2} +8x-4/ sqrt{x+3}$
f'(1)=9+8-4/2=15