Am si eu mare nevoie de ajutor la supunctele B , C
Dau coronita

a)2^(n-5)=8¹³
n=4
b)3^(2n-3)=27⁷:9²
3^2n×1/27=27⁷:9²
3^2n=27⁸:9²
3^2n=(3³)⁸:(3²)²=3²⁴:3⁴=3²⁰
2n=20
n=10
c)5^3n+1=25¹¹
5^3n+1=(5²)¹¹
5^3n+1=5²²
3n+1=22
3n=21
n=7