T∂∂X∂ = A2 2∂ + TE-X UT=0 = SINX 2UU

3. - BAI TAP CHO 16 UNIT 12 CO DAP AN
BAI TAP CHO 16 UNIT 12 CO DAP AN
3. t∂x∂ = a

2

2

∂ + te

-x

u

t=0

= sinx

2

u