Question

Urgent! Dau coroană!
dau test ​

Answer 1

Răspuns:

(x+1/x)²= (x+1/x)( x+1/x)= x²+1+1+1/x²= x²+1/x²+2= 5

Deci

x²+1/ x²= 5-2= 3

Explicație pas cu pas:

E(x)= 3+ x⁴+1/x⁴