解
1/3x²y^(a+3)與0.4x^(1-b)y^4是同類項(xiàng)
∴2=1-b,a+3=4
∴b=-1,a=1
∴5a²b²+1/4ab-2a²b²-1/6ab-3a²b²
=(5a²b²-2a²b²-3a²b²)+(1/4ab-1/6ab)
=1/12ab
=1/12×1×(-1)
=-1/12若-3/5x的a次方y(tǒng)z的b次方與4x的三次方y(tǒng)的c次方z的平方是同類項(xiàng),則a+b+c的值幫我再看一下這道題好嗎解-3/5x^ayz^b與4x³y^cz²是同類項(xiàng)∴a=3，c=1，b=2∴a+b+c=3+2+1=6