排列与组合做这类题有什么不用公式的灵活办法吗?求指导,最好举例子

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 17:00:20
x=rHh"mǴ~ܘ}޷bbe(:m%RKHP"Fa3+ Arl2,蛿٪,ª٩ؽ9V+ n> ެYE1SG,{nƜ=mbV_Z3Botk3fּ-7?{Q?AHa읰l,`i[}GfbagpfvΪmovcy:-nMr-f'ÚΩN zSxI2V Xa h2zeH9@` vhW\r>^r4Ʈ1!AD7ݶU(} Ogc:m_L6 Nx՝K ;9s0*;v-fZhl~ǽ bޕitZ 5֚%R$ɛ6ٽt@ɸU Ɖ3%L{L{>ad#'x7[q$2 h(RɕRV:!oEV齂_xsFtxxǸ2zoJ;}]@Btk=1"~Y%h*:P _hDU b̕(b&HHux634+r u?xԡ1 )\Mjc,6D7 P%hfv+3@o<,h#&)>VDSRA rfD9xD Bp>\\TD4v\05c9&]*4u#\%+আM)p+n*TŪU~֢ng0rRE<Δ}Z%#KxxD$7"yH\Mhm=FL]L!?!C1GZ͚] ]k{ZX[ԏU3͖ <ࠢFF+d`D(̓zm|3eozBOzOT>oòN3ȗY>NKX>6Z҃;<[@=jt~Q/u{Z-tyru* N SqDR($,., \iT¼]o>:ǵ(a"(ظZ ;>K2~O//R?DJ Sͅ`R?~p"lǀI|,yUc|u|g&>7U#|N_^LO&O&s]Z D|7'1@ǟ47"! \ 5ڕ]g}\U8e}{Ǯ8[t u[^j\?7;]LA>ǚemK1R NFk]ע ԞӾ'ˉ'rId̰e>QUi16W+&YryB_=B&lPL.cxJu*ۍ#=D@B@g0 cj8F9I9(@\z#1 D@oippXwfDC$B?ЂM EУ;e`! !!Wn2]b ~ϬѐL?.:LMJR.UHcqq/abX)t m\HxBI0>9`kgn z¹;w%)eS_M}?@GBѹSs޹G%/w2 {:2k߀jwX8[`w9-P/kڮnƨDXC-ݥ[鬋#k,ktݤI薀ȇ[Nkn#DrEӐ,8)mRC2 ֮0rYi88݋3}>f6@_1l\Z5{6P&ut ]3R1<|x=EFa Rwqhuk4Xқ% p-DD!b&4GIVb#["+Z73_W'~]Muw~tr׮w),q=Nڋ !8vtY:^`ڴl  `5lĤXM )K-YX'l^$&0O7$(G)0ZR`=$C  8EVeEhмtdڠ8בJ DP#EsBK@5е[Kt\©*c14J Ni_ ;@HY- ]@*?t Ϭ.]i|Xz!;ڽ|7\n>2NRh!EUoaH~Z;5hŮ՚.nXdfEoK 6.{Z`>`7Za\vS!᐀r-|=gנd.u7*+N5Aȥ0\9xlG xYgS:LE),aWH}O=E/P1GpQ х$kk3{W27i)xLo?y`-yBMSX!{,KHIÝw7 gm/Tq]a~У~(0@iOL+B*! ١(KB=t6j҈:0rLYssJk@em`GcZ @=[HD8Ӵk;ǍQ@뷪=J*)˴ Kyn4O3X,%=JqbḐ ػJ<&|- g~Y32썵 4 Qz 2|gKOPnGBB 'e뾌a'ÂKEKozh5@,qFY\ѺwQ|SB ="Lz)3:O=F"Z4/V"92 /J. %xjTAP"F_ D=D1xΖs4\R]?OEs յV0 VlvP-0; 6`P{7X-]@LlWh X3$ V)|RJT3b2f<ͪnczIV+[SjBu pJkVMW ב b21Ye 4[@P5Ufj"@t'BTDo?vt/{7k/v,%/.}jI-ax$_-fT1`Wq%Z:c"LNՃ$ -Rp#5?$< O/(WSOG%ӱ _aHCQMKMÙNjO&a]jRL+8.rPPMݮi>%/TnQW/xaKu8'`8l[ɧg*ĵ#b<1b]֞8?GAKgyK -s \gE1)xhw P&[o0O[bħov+t*q9 ,]2rV)?#P'R7/d XO9N`1z"JQ_J]'>REZRn vXlUDJOx8fgp3 4=YRZ5ͺK%xOS:Fl>[ uҙ \ܭ'c1s,jQYTe=k^=Z!A1 ؘҬL{s ̠L#Y0\T#=A^4 xc,*{]~Hh\8tV%HǕ __*'qDe8 k%a0~\ e>ryT L}(B:Q"ID2oFԆ('~q83T "c 9 -{^>0T%UP:#Q'@o!M^hZ+(n~+yM?$.{Jq[m,yLf: L ԊRoIs{B.R`bxcۃ#{ FU2Bc )e3/<"|Hl3/7`F$MpnZ&++֩byݠ$j}$oӿ^{ɜ`7.`WZM[ ^b"yhD2OltR@tAg_ -YBǶviP /⛗2#%Lt*G:e6FD@ ~,!) ZU4dL\̓F=EjL؉3V MC;.7{◣Bh!296ɡ|1?)#Snw1박IrwD8 h?d4}^)Rect%sxeq &Y&'j<%bnI㩥#:Piz]'l$侎er]=B[gGӞS*d+X+ɢ+F d0ZbB^7B^et]FFž'.V%0~k۹/m9|ip)26E Pȋ"迁I@CO8 C?:<~Қ@8W}^ V`zvctm kqEuRz9<5"*eɇ{vXc{w+œoS};,-x*G岬i[vc8grM'{b)p) G)s\-$8{KwryךwbJc|W|-!Gaq%ZL"z ^GrxlDښmWPŢBx*RE)U:(KOcr1 B*|P /6X8#DQ'3)vC'_-pnqk7\qGc7ov@n?m(M1e+ܬ*x9k:nd6wsWk]XQjAU_/XS&qeKυoAGcq9A8eշΛ6m+I\Sx^۵Y 5j\C" wyՎqƁ%^X\ZEJ"I-] qvu_5;+*!?O^D0d1CH 3uGxAalAm"y"QFU:"s%E|:\GmA6G ?x!uѤu\-'}.>L(h>w`h5=Ɨ0 m\Q_֎y&q'tISb~}I֙::[o3Ѿ#i\ȿeyB?f{W RWsWPW[>eqCi/ʔAnρG?sV>;x*IڽDG4l7 EORU&zt# SgvУ2 1|ȩEgzǒ}ª|x\=|,{η^HR]!n(n}1AOgUH^j"i!l $\&Rp=i L$~`ku/EA14{=tO^d\MȎ)ّ t\:RB@p PCU$maO]ɮVS< 1]Rk=!Jg/c2 ӻ6 L>eUZV}i?k-NJMBs;7G ->QcXivFy.iatݫ88tJPv Uͮz&ժ0WZ/\xsk8sOHKnж+h|xc,^7\|YrKn;^7hlwi;ܙ?gl~5~*Rޭj Yb/л*9#