Question

3 si 4 va rog!
Am nevoie mare!​

Answer 1

Răspuns:

3)  x-20x/100=160

amplificam cu 100

100x-20x=16000

80x=16000

x=16000/80

x=200

4)  1/√2+1+1/√3+√2+1/√4+√3=1

amplificam cu conjugata

√2-1+√3-√2+√4-√3=1

-1+√4=1

-1+2=1

1=1 adevarat