八年級(jí)下冊(cè)數(shù)學(xué)令原計(jì)劃每天裝x臺(tái)那么后來每天裝2x臺(tái)30/x-（30-6）/2x-6/x=312/x=3x=4所以原計(jì)劃每天裝4臺(tái)新技術(shù)后每天裝8臺(tái){0}2，八年級(jí)下冊(cè)數(shù)學(xué)不懂設(shè)y1=k1x2y2=k2(3x+2)∴y=y1+y2=k1x2+k2(3x+2)當(dāng)x=-1時(shí)y=33=k1-k2(1)當(dāng)x=1時(shí)y=-3-3=k1+5k2(2)解（1）（2）得k1=2k2=-1∴y=2x2-3x-2由題意，得y1=a/x2y2=b/（1/3x+2）則y=a/x2+b/（1/3x+2）把當(dāng)x=-1時(shí),y=3.由...