1、 理科数学答案 第1页(共 5 页)资阳市高中 2020 级第一次诊断性考试 理科数学参考答案及评分意见 评分说明:1本解答给出了一种解法供参考,如果考生的解法与本解答不同,可根据试题的主要考查内容比照评分参考制定相应的评分细则。2对计算题,当考生的解答在某一步出现错误时,如果后继部分的解答未改变该题的内容和难度,可视影响的程度决定后继部分的给分,但不得超过该部分正确解答应得分数的一半;如果后继部分的解答有较严重的错误,就不再给分。3解答右端所注分数,表示考生正确做到这一步应得的累加分数。4只给整数分。选择题和填空题不给中间分。一、选择题:本大题共 12 小题,每小题 5 分,共 60 分。1
2、-5DDACC6-10AACBB11-12CD 二、填空题:本大题共 4 小题,每小题 5 分,共 20 分。13 814 215 3 716 341(e)2,60 17.12 2ma8ma5ma 2 q 3mS9mS6mS*mN 3692mmmSSS+=4 1q=111362 9mamama+=1q 6 369111(1)(1)(1)2111mmmaqaqaqqqq+=369112(1)mmmqqq+=3692mmmqqq+=3612mmqq+=9 215121325111(1)mmmmmmaaaqaqaqq+=+=+21681118222mmmmaqqaqa=2ma8ma5ma 12 18
3、.12 1222(coscos)cBbCbcbc+=+222(sincossincos)sinsinsinsinCBBCBCBC+=+2 222sin()sinsinsinsinBCBCBC+=+222sinsinsinsinsinABCBC+=+222bcabc+=4 221cos22bcbcAbc+=1cos2A=0A na 理科数学答案 第2页(共 5 页)3A=6 2ABD11sin262AD ABBD h=hABCBC ACD11sin262AD ACCD h=12BDABCDAC=7 2133ADABAC=+8 222414999ADABACAB AC=+22414442 cos9
4、993cccc=+2129c=3c=2 3b=10 222222cos(3)(2 3)32 393abcbc=+=+=3a=12 1912 112nnaSa=+2n1112nnaSa=+122nnnaaa=12nnaa=2n 1 na2 2 3232Sa=+123232aaaa+=+11762aa=+12a=3 na2nna=4 2112312322nnnbbbb+=1n=112b=112b=5 2n1231123122nnnbbbb+=1(22)(22)2nnnnnb+=2nnnb=112b=2nnnb=*nN 7 231232222nnnT=+12231112122222nnnnnT+=+
5、8 231111(1)11111221222222212nnnnnnnT+=+=1212nn+=理科数学答案 第3页(共 5 页)11 222nnnT+=12 2012 12()3fxxa=3000(1)xxax+,1 320000(1)(3)()yxaxxa xx+=2(1 0),3200001(3)(1)xaxxax+=32002310 xxa+=3(1 0),()yf x=1 32002310 xxa+=1 32()231h xxxa=+2()666(1)h xxxx x=()h x1.4 0 x()0h x()h x01x()0h x()h x1x()0h x()h x 0 x=()h
6、 x(0)1ha=1x=()h x(1)2ha=x()h xx+()h x+()h x1(0)10ha=(1)20ha=1a 2a a(1)(2)+,6 23()1cosg xxaxx=+0 x 2()3sing xxax=+2()()3sinu xg xxax=+0 x()6cosu xxx=+7 02x()0u x2x()0u x 0 x()0u x()u x()g x(0)+,(0)ga=(0)0g=8(0)0ga=0a()(0)0g xg()g x(0)+,()(0)0g xg=9(0)0ga=0a 22()2sin033aag+=+023(0)xa+,0()0g x=00 xx()0
7、g x()g x00 xx()(0)0g xg=a(0,12 2112 12()(1)exxf xa x+=+1()exxfxa+=+()f x()0fx1exxa+2 1()exxg x+=()exxg x=0 x()0g x()g x0 x()0g x()g x 理科数学答案 第4页(共 5 页)0 x=()g x(0)1g=1a a1)+,4 2()f x()0fx=1exxa+=10 x=()g x(0)1g=1x()0g x x+()0g x ()g xa=01a1210 xx 6(0 1),(e 0),11eyx=+111()()(1)1eeexxh xg xxx+=+=+0 x
8、1()eexxh x=+1()()eexxu xh x=+0 x 1()exxu x=0 x 01x()0u x()u x()h x1x()0u x()u x()h x0 x()u x(1)(1)0uh=0 x()()0u xh x=,则()(0)0h xh=,即1()()(1)0eh xg xx=+,0 x 1()1eg xx+11exa+=4x4eexa=9 21yx=10 x,2()()(1)t xg xx=211()11(1)e eexxxxxt xxx+=+=+()1(1)exv xx=+10 x()e0 xv xx=,10 x()v x ()(0)0v xv=10 x+10 x()
9、0t x 2()1g xx 21xa=10 x 3x31xa=134210 xxxx 2143ee1xxxxaa=+12 224410 16=2cos2=2cos13P=P(1)6,1 GQ(2 0),2 22|122 1 2cos52 36PQ=+=4 理科数学答案 第5页(共 5 页)2()AA,0 2()3BB+,5 2cos2A=22cos2()3B=+AOB123|sin|234ABABS =6 344|cos2cos(2)|43=+13|3cos2(cos2sin2)|22=+233|cos 2sin2 cos2|22=+33|(1cos4)sin4|44=+3|3sin4cos41|4=3|2sin(4)1|46=9 3462=512=max3 34S=AOB3 34 10 234510 112x ()22214f xxxx=+3152x 1 112x()22214f xxxx=+112x 2 1x()22214f xxxx=+513x 3 35|53xx 5 2()|221|22(1)|23|2f xxxxx=+=2(22)(1)0 xx+112x“”()f xT33abc+=7 112 11232()()()22222222abacabacabacabc+=+=+=1324bca=“”3 22abac+.10