4分之3a的4次b的7次+2分之1a的3次b的8次-9分之1a的平方b的6次)除于(-3分之1ab的3次),其中a=2分之1,b=-4
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(4分之3a的4次b的7次+2分之1a³次b的8次-9分之1a²b的6次)除于(-3分之1ab³),其中a=2分之1,b=-4
=(9/4a^4b^7+1/2a³b^8-1/9a²b^6)÷(-1/3ab³)
=-9/4a³b⁴-3/2a²b^5+1/3ab³
=-ab²(9/4a²b²+3/2ab³-1/3b)
=-1/2×(-4)²×[9/4×(1/2)²×(-4)²+3/2×1/2×(-4)³-1/3×(-4)]
=-8×(9-48+4/3)
=-8×(-113/3)
=904/3
=(9/4a^4b^7+1/2a³b^8-1/9a²b^6)÷(-1/3ab³)
=-9/4a³b⁴-3/2a²b^5+1/3ab³
=-ab²(9/4a²b²+3/2ab³-1/3b)
=-1/2×(-4)²×[9/4×(1/2)²×(-4)²+3/2×1/2×(-4)³-1/3×(-4)]
=-8×(9-48+4/3)
=-8×(-113/3)
=904/3
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