Question

urgent 100 puncte coroana stele inima​

Answer 1

a) 2^(x+1)+2^(x-3)=2^(x-4)+33

2^(x-4)·2^5+2^(x-4)·2^1=2^(x-4)+33

2^(x-4)·(2^5+2^1-1)=33

2^(x-4)·33=2^0·33

x-4=0

x=4

b) 2^x+4^x=20

2^x+2^2x=20

2^x·(1+2^x)=2^2·5

⇒ x=2