T∂∂X∂ = A2 2∂ + 3XT2 UT=0 = SINX 2UU

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

2

2

∂ + 3xt

2

u

t=0

= sinx

2

u