8752+t∨

郦严时814已知t^2+t - 1=0,则t^3+2t^2+2008= -
侯荀哪14756388504 ______ t^2+t-1=0 所以t方 + t=1 t^3+2t^2+2008=t(t方 + t)+ t方 + 2008=t x 1 + t方+2008 =1+2008=2009

郦严时8143t+t - 2t=? -
侯荀哪14756388504 ______ 2t

郦严时814已知x+y+z=1,x+y+t=2,x+z+t=3,y+t+z=9. -
侯荀哪14756388504 ______ 设x+y+z=1 ① x+y+t=2 ② x+z+t=3 ③ y+t+z=9 ④ ②-①:t-z=1=>t=1-z ⑤ ④-③:y-x=6=>y=6-x ⑥ 将⑤、⑥带入②中得:x+6-x+1-z=2=>z=5 将z=5带入⑤中得:t=1-5=-4 将z=5、t=-4带入③中得:x+5-4=3=>x=2 将x=2带入⑥中得:y=6-2=4 综上所述:x=2 y=4 z=5 t=-4

郦严时814(1+0.4567+0.5678)*(0.4567+0.5678+0.6789) - (1+0.4567+0.5678+0.6789)*(0.4567+0.5678)= -
侯荀哪14756388504 ______ 设0.4567+0.5678=t 则:原式=(1+t)(t+0.6789)-(1+t+0.6789)*t=t(1+t)+0.6789(1+t)-t(1+t)-0.6789t=0.6789

郦严时814(6 - t)²+(2t)²=36
侯荀哪14756388504 ______ 36-12t-t²+4t²=363t²-12t=0t(t-4)=0t₁=0 t₂=4

郦严时814解方程(t^2+t - 1)(t^2+t+2)=4 -
侯荀哪14756388504 ______ 令t^2+t=x 则(x-1)(x+2)=4 x²+x-2-4=0(x+3)(x-2)=0 x=-3或x=2 即 t^2+t=-3或t^2+t=2 当 t^2+t=-3时,方程无解.当 t^2+t=2时,即(t+2)(t-1)=0,t=-2或t=1 希望对您有所帮助 如有问题,可以追问.谢谢您的采纳

郦严时814t=10/6 - t怎么解
侯荀哪14756388504 ______ t=10/6-t 2t=10/6 5=5/6

郦严时814左边是虫右边是面 怎么读? -
侯荀哪14756388504 ______ 蝒 拼音:mián 注音:ㄇㄧㄢˊ 部首:虫,部外笔画:9,总笔画:15 五笔86:JDMD 五笔98:JDLF 仓颉:LIMWL 郑码:IGJK 笔顺编号:251214132522111 四角号码:51162 UniCode:CJK 统一汉字 U+8752 基本字义 -------------------------------------------------------------------------------- ● 蝒 mián ㄇㄧㄢˊ ◎ 蚱蝉,一种发声很响的大黑蝉.

郦严时8144*t的平方/1 +t的不定积分是什么 -
侯荀哪14756388504 ______ ∫4t²/(1+t)dt=4∫(t²+t-t-1+1)/(1+t)dt=4∫t-1+1/(1+t)dt=2t²-4t+4ln|1+t|+C

郦严时814求(1+t)分之t的不定积分 -
侯荀哪14756388504 ______[答案] ∫t/(1+t)dt =∫[1-1/(1+t)]dt =t-ln|1+t|+C