Question

pls matematica dau coroană​

Answer 1

a = 2^1990 - 2^1989 - 2^1988

a = (2^2 - 2 - 1)* 2^1988

a = (4 - 2 - 1)* 2^1988

a = 1* 2^1988

a = 2^1988

2^1988            4^993

______     =     _____

   x                   0,25

2^995            

_____     =  x = 2^997

x0,25