V
vietphuonga1


1.[TEX]log^2_23x+log_32x=log_23x+log_23x.log_32x[/TEX]
2.tinh:[TEX]\int\frac{sinxdx}{sin2x-3cos2x-1}[/TEX].
2.tinh:[TEX]\int\frac{sinxdx}{sin2x-3cos2x-1}[/TEX].
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