Question

DAU COROANĂ AJUTORRR​

Answer 1

a)

n=0

b)

n-3/0 => n=3

c)

3n-33= 0 => n= 11

d)

n-3/0 => n=3

n-7=0 => n=7

Dovada:

(n-3)(n-7)=0 => n^2-10n+21=0.=> n(1) = 7

n(2)=3