1. 畛 thi THAM KH畉O
M担n To叩n cao c畉p 2 畛 1
(Th畛i gian: 90 ph炭t)
(Sinh vi棚n kh担ng 動畛c s畛 d畛ng ti li畛u)
C但u 1:
C但u 2:
C但u 3:
C但u 4:
C但u 5:
C但u 6:
C但u 7:
C但u 8:
3n
n
a, T狸m mi畛n h畛i t畛 c畛a chu畛i hm s畛 2 x 2
n 1 n
0 khi x 0
b, Cho hm s畛 f ( x ) tu畉n hon v畛i chu k畛 2 .
sin 2 x khi 0xｏ
T狸m khai tri畛n Fourier c畛a f x .
