∫﹙x²*a^x﹚dx

∫﹙x²*a^x﹚dx
∫﹙x²*a^x﹚dx

∫﹙x²*a^x﹚dx
∫﹙x²*a^x﹚dx
=1/lnx*∫x²da^x
=x^2*a^x/lna-2/lnx*∫xa^xdx
=x^2*a^x/lna-2/(lnx)^2*∫xda^x
=x^2*a^x/lna-2x*a^x/(lnx)^2+2/(lnx)^2∫a^xdx
=x^2*a^x/lna-2x*a^x/(lnx)^2+2a^x/(lnx)^3+C