=∫-x²/5x² dx
=∫(-1/5)dx
=-x/5+C
=∫9^x*e^xdx
=∫(9e)^xdx
=1/ln(9e)*∫ln(9e)*(9e)^xdx
=(9e)^x/ln(9e)+C
积分 （2的x平方减去3的x平方）/5的x平方 等于?3的2x平方乘以e的x平方等于?
=∫-x²/5x² dx
=∫(-1/5)dx
=-x/5+C
=∫9^x*e^xdx
=∫(9e)^xdx
=1/ln(9e)*∫ln(9e)*(9e)^xdx
=(9e)^x/ln(9e)+C