2∂∂∂TTX∂ T=0 = X ∂ = A2 2∂ + TSINX UT=0 = COSX, 22UUU

10. - BAI TAP CHO 16 UNIT 12 CO DAP AN
BAI TAP CHO 16 UNIT 12 CO DAP AN
10.

2

∂tx∂

t=0

= x ∂ = a

2

2

∂ + tsinx u

t=0

= cosx,

2

u