.
(I)proof:
Yes,whatever;
(II)findingthegeneraltermformulaofaseries;
Third,mathematics(liberalarts)referenceanswersandscoringstandards
Achoice:
thebigquestions,8items,eachitemof5points,atotalof40points.
1.C,2.B,3.C,4.D,5.A,6.D,7.B,8.B
Two,fillinthetitle:
6items,eachitemof5points,atotalof30points.
9.2x+3(5points)10.2(5points)11.-2(5points)
12.(firstempty2points,secondempty3points)
13.(5points)
14.;(firstempty2points,secondempty3points)
Three,answerquestions:
thistopic6items,atotalof80points,theothersolution,pleasecopythistothepoint.
15.(12pointsoutofthequestion)
Solution:
dreamsofF(x)theminimumpositiveperiodforpi*...........................3...
Stardreams
Dreams,star..............................5...
Sorghum..........................................8...
(II)solution:
obtainedby(I),
Whenl,
Immediately,f(x)monotonicallyincreases
*f(x)monotonicallyincreasingintervalis...........................12...
16.(14pointsoutofthequestion)
(I)thatis:
dreamsarethreeprism,
L
L
DreamsisaregulartriangleDeltaABC,EisthemidpointofAC,
L
So,...............................................................4...
(II)prove:
even
Dreamsisthreeprism,
Risarectangle,Disthemidpoint.
EACisthemidpointofdreams,
L"DE.dreams,
L"plane.....................................................................8...
(III)solution:
forG,evenCG.
Knowfrom(I)plane,
*.....................................................................9...
HenceFGisCGintheplaneoftheprojection.
Accordingtotheoremthree.*,
L/CGFisplanedihedralangle.......................................11...
AB=a,dreams
IntheRtDelta
IntheRtDelta
Indreams,*.
Thesizeofthedihedralangleis45degreesw..................................14...
17.(12pointsoutofthequestion)
Solution:
thedailysalesamountisyyuan,andy=P=Q:
...2points
L
Thatis,......6
When............8
Whenmonotonicallydecreasing,
Rt=25,.............................................10...
Star.
Themaximumamountofthegoodssolddryfor1125yuan,andnearly30daysinthetwenty-fifthdayofthebiggestsales....12...
18.(14pointsoutofthequestion)
(I)prove:
takeit,and,
...3
Dreams,.........5...
Dreams,star.
Thatis,dry.
So,theincreasingfunctionofR......................8...
(II)solution:
[1]solutionofdreams,
*.....................11...
Solutionstoinequalities
(1)areobtained,,
Solutionstoinequalities
(2)areobtained,
0Hencetheoriginalinequalitysolutionsetfor.......................................14...
[solution2]functionf(x)definitiondomainfor:
...8points
Solvingequationf(x)=1isobtained
(I)byF(x)isanincreasingfunctionofthestarf(x)>1,.
TheoriginalStardreams,inequalitysolutionsetfor......................13...
19.(14pointsoutofthequestion)
(I)solution:
thelinearlequationisy=x-2,andissubstitutedbyit,
Sortout...For.......2
P>0dreams,*.
Set.
*............................4...
|AB||BC|,|AC|dreams,equiratiosequences,
Star.
L,
Organizeas...
Willbereplacedbytheformula,thesolutionp=1.
Hencetheparabolicequation..................................7...
(II)solution:
supposethatthereisapointontheparabolathatmakes|DB|+|DC|,
RememberthelineBCatthemidpointof
Then....10minutes
Whenp=1,theformbecomes
So,.
Acupuncturepointshouldmeet............................12...
Getit
Thereislittleordry(8,-4),theestablishmentof|DB|=|DC|...........................14...
20.(14pointsoutofthequestion)
(I)proving:
provingbymathematicalinduction:
Whenn=1,thepropositionisestablished;......2
Assumethatwhenn=k,thepropositionisestablished,i.e.,whenn=k+1,
.
Lwhenn=k+1,thepropositionisalsotrue.
Synthesisone,twoknow,pairofHengholdswater......7!
(II)solution:
dreams,
*............................11...
Peryleneseriesistoleranceof1arithmeticprogression,thefirstitemis.
*..................................14...
[Note:
(I),(II)twoquestions,independentpoints.]
NorthhighschoolschoolIwishyousuccessinthecollegeentranceexamination