請問「第五題怎麼解？

N- Why on [ (X7 IBN 設A為實數,ce gaa + 8.247a+3a=0怡有二實根,則: x H = 1 BON (A) a > 0 (Ba>-1 (C) a < 5 (D – 1 <a< 5 (E) - 3 sa<0. <a <a [26a+)40 at3a) 20 答:(B)(C) (D)(E)【南一中、雄中) 4 (9a that) - 282-12020 Satpa+420 2a 13at12o 1-21

第二大題的第（3）小題不太會，麻煩各位高手了！

C'。 1 241) PIX)-----x*b25 *P() 75*1*stel*z*dx> x***-*=> 1426x=24&st-25+-$) 二、設A(1,0)、B(0, 1)為坐標平面上兩點,為直線AB外一點。經平面線性變 換M作用後,A被映射至4 (1,02)、B被映射至B'(-1,2),而C被映射至 Claub) (1)試問變換M的矩陣為何?(4分) ( (a-t, ahol (2)試證明變換M將入ABC的重心映射至入A'B'C'的重心。(4分) (3)若AABC的面積為3,試求點C'與直線AB的距離。(4分) (( 2 ALIVYOTUBE 155) So In Lol- larta pars ) - Cambodiatib) Ty= otitb. to make bath within this MLADECAL - a din sath (2) 4x2 tota 3 【fb 3 a-b 25ct kat Jab

請問（5）要怎麼解？

(5)函數的(最小)週期為下 0 ²4 de ] nos o sa ath X' 平 Sathe (cedit) cose g 考慮向量a=(a,b,0)、y=(c,d,1),其中a+b=c+d=1。請選出正確的選 項。 (1)向量與Z軸正向的夾角恆為定值(與c、d之值無關) (2)立的最大值為」和甲方 (3) 與立夾角的最大值為135/ 5 (4) ad-bc的值可能為 zx的最大值為2 do do h 4 Brus - autadtax betholth u. Je Cait.a) (cid. 1) acradta + betha 11:14 Stichi ad-hu) D A di || 山 but at andradbe & ber- 12 17| 年 To ( 、填充題(占12分) 一答對不給分。 but 未 宗

看不懂這一行怎麼來ㄉ

10 的圆上 215 CER C =0 - A+ 1+ 2 sin COS COS +2isin + i sin 6 6 (D) f) g) - = f(t)g(1) (Ey milo = 1 3{cos +isin 6 2 2018 4 (V3) (COS TT + isin ) = -27 a=-27: b=0 *** (a,b) = (-27,0) 1 1000 = x + x +++ .. f(x) g(x) x2 ABCDE) 8. pf: (1) x? - (2 cos)x+1 2 cosat FC300 (-1)*3* = C 200 (12)* ((13)?)* k=0 1000 2k En k=0 (已知) = 2400 (i.V3)2 =C 2000 + 2000 (731) +C 2000 (137) +C 2000 (131)+...+C 2000 (1+ 731)2000 + (1 - 37) 2000 2 200 (731) 200 > ..x= cos ati (2) X=cosati 1 x?" = cos 27 (2 cos na)* (2000 = 2(costisin - . . in no) +(2(cos :..x2"-(2 22000 +isin 20001 3 3 TT TT +(2(cos-isin ))2000) 3 3 2000元 (cos 3 2000元 20001 +cos -isin 3 3 1 21 22000 . 2 cos- 2 3 同理=1 (一) = -2 1999

數甲 三角問題 我想問為什麼這樣解是錯的呢 請大師幫我抓錯

3 Tu To this 時、 1. F1 z Z sina+cos O=t, -Jestste >= t = 1+ 2 sindrosd i sindcuso = t - 1 sin acusa it sino taso Y+ (SPD+cosp) sprocus 题>> 寺,y有最小。 2002 » Yt Yt = t²1 » Y+ 1 = I - Yt 最小值為3 Max f(x)的波路 個區間內? 2 - Jastaje p osts 2 D ostel ATYZ_yt < JEY JY & THI < Jert | B»-JET-1 5 Y = Forth .Y²s (Jo Y + )² 》 » Y= 27+ Filtly Y? + JY + 420 - 1 EYE Sat 1 差不多。 TD- 0 1-4A +1 2 ,最小值為 sin Ocos @ 「類題 26 c為任意實數,y=1+ sing + cos9 的最大值為 (一 o - Sin y+ cosx)=(sinx + COS x)的最大值為 (sinar #cosx)的最大值為,最小值為

可以幫我看錯在哪嗎謝謝！

Bats batta 19,2474) satuts -2 D. 坐標平面上有一梯形,四個頂點分別為A(0,0), B(1,0),P,Q,其中過P,Q兩點的直線方程式為 / y=2x+4,右圖為示意圖。若O點的坐標為 (a,20+4),其中實數a20,則梯形ABPO 的面積為2 0 Ato,oB(1,0) 012- X=2-3,2x=3 atb, x=Žát3 za +4= 30t/o oA00/2 0 | =4078 'at2 zath , (a) 2u • 13 3 A I 180 122) 2 POB | 3ats Bathol- qat 30

根本看不懂啦＼(￣▽￣;)／

Your report should follow these guidelines, although you may choose how you present it: How to Write a Mathematics Report In writing your report, remember that you are writing up a mathematical story and so, like all good stories, it will need a beginning, a middle and an end. More formally, the main components of this writing style are: Introduction, Formulating the Problem, Solving the problem, Discussion of Results, and Conclusion. We will now consider some of the detail in each of these aspects. Introduction This is the beginning of the story. Give a brief explanation of what the problem is about what the goals of the report are and what will be presented. Assume that your reader does not know what the problem is about or how to solve it. Formulating the problem Translate the situation into a maths problem. Explain how you will begin to solve the problem and break it into simpler stages. Discuss any assumptions made. What quantities are variables and which values are fixed? You may use sub-headings if they assist you. Solving the Problem Show any calculations and mathematical reasoning that you use. (Assume that your reader does not know much maths). Do not show the same types of calculations repetitively. Just give one or two examples of a calculation and then put the rest of the results in a table. Use diagrams or graphs if they assist you. Make general remarks about what you observe in your calculation results and, possibly, why. You may want to criticise your work and go on to improve it in the next section. Explain what you will do next and why. Discussion of Results - Evaluate and Verify Summarise your results if necessary and refer to your mathematical reasoning. Justify procedures used. Interpret your results. First, are they reasonable or does something not look right and need further investigation or checking? Is there a decision to be made? Here is where you should present the decision-making process. Evaluate the strengths and limitations of your solutions. Conclusion Summarise your findings. Refer to the problem outlined in the introduction. Make sure that you answer the question that was asked. Make recommendations. No new material should be presented here.

不太理解空間題目的算法。

Xhch hit it-34thn 710.2.0) +++X t _X = X Hithrithty sle 3x2]e 1014-(2-0) #160.232 O |(0,-2,0),求A點的坐標 一個四角錐 A-BCDE(底面為正方形,側面為正三角形),若B(2,0,0),C(0,2,0), D(-2,0,0), E 6 (6 ) tx8t X2 = 157 0 6 61771 nofalkt 8 7 5 1 0 6 2 13 3 12 8 9 10 ICM 14 11 oth HUILE 101 111 '12 13 14 3 2 台bl|| CoX @ CR-1500 - H划, 112-Xhat 16 0 21 3 7 19 i 85768 mm 求P點的坐標 已知A(-2,4,3), B( 13 -8.6)為坐標空間中的相異兩點,且P點為X軸上一點,若 PB = 2PA (8) 6 (4) 81 DT Clap tot al = 9 + 9 413) ol=1-sto So It q 2 Gab 1:9 19 9 =2+176 satta Gladtb b=0 at

怎麼算

un 14 - Mixer 2 = 3xjd 則 an= sat1 an = an-1+n (n22) Lee anti-ante 若數列(an)的遞迴關係式為 Anti-an=n