TA CĨPQPQ0 ⇔ = ⇔ = = =.,2.,2.. 0. 0,2.0,PP ΛΛΛKTPQ NKTPQ5TTKTPQKTKTH T...

Câu 4: ta cĩ

pq

0 ⇔ = ⇔ = = =.,2. 00PP λλ

kt

pq

N5t

h t t p : / / w w w . t a i l i e u p r o . c o m /