想請問（5） 看不太懂詳解

6. (1)(2)(4) 1)(3)(4) 出處:第一冊〈直線與圓〉 目標:圓的標準式及半徑、圓與直線的關係 解析:(1) O:(x+2m)²+(y-m)²=5m²-5m+2 3 =5(m-²)+2-恒成立 4 4 圖形為以O(-2m,m) 為圓心,半徑為 3 5m. +二的圓 2 (2) O:承(1),圓面積為 (3) X(4) O:d=d(O,L)= m -10m+10 5 4 TZ |-6 -6m-4m+10 | √√3²+(-4)² =|2m-2| -d²=(5m²-5m+2)-(4m²-8m+4) 3π 4 =m²+3m-2 ∴ - 可能為正,可能為負,也可能為0 (5)X:277-8=2(m㎡ +3m-2無最大值 故選(1)(2)(4)。 9.

求解第二小題

類題 3 設方程式+y+2(m+1)x-2my+3m²-2=0之圖形為一圓,則: (1)m 之範圍為 - <m<3 V (2)當 m= 解 1 AND 時,圓之半徑r有最大值為 (2m + 2)² + (-2m)² 4.(3m²-2) >0 2. 4m²+8m+ 4+4m²= 12m² + 8 >0 2 4m-8m-12<0 m²-2m-340 (m-3)(ml) <0 -1<m<3 d'te-4f

請問D為什麼正確🥺🥺🙏🙏

類題 質量為m的汽車在與水平面夾角為 0 的斜面跑道作半徑為R的 圓周運動,其面對車頭直視時的示意圖如右圖所示。設重力加速 【110.指考】 度的量值為g,下列敘述哪些正確?(多選) (A)若夾角 0 = 0,無摩擦力則無法作圓周運動 (B)需摩擦力克服 沿斜面的下滑力 mg sin 0 才可作圓周運動 (C)無摩擦力也可作圓 周運動,此時斜面跑道對車的正向力為 mg cos (D)無摩擦力也可作圓周運動 時速率v=Rg tan O (E)沿斜面向下的摩擦力可增加作圓周運動的向心力 可分解增加气 , S TOP 3 N· cos 0 = mg :smg=Fc sind coso Ac V g Rg. = tand = my - mg tant =Rg. > V=J Rgtanb AE 01

你知道為什麼第五題是c嗎？

5. My mother has the living room 不加受詞 every Sunday morning. (A) clean (B) cleans (C) cleaned (D) be cleaned

想請問第11題mg=kx是怎麼知道的，謝謝

& B E v(m/s) 第 3 50 ~ 52 為題組 116 50.將質量2公斤的小球由彈性常數k=500克創徊了 牛頓/公尺的理想彈簧正上方某高度處 靜止落下,並壓縮彈簧,如圖(a)。當小 球與彈簧開始接觸瞬間到彈簧被壓縮至 最短距離的過程,得到小球的瞬時速率 v與彈簧壓縮量x的關係,如圖 (b)。已 圖(a) 圖(b) 球向下加速向下減速、 知b為圖形曲線的最高點,若忽略空氣阻力的影響及彈簧壓縮過程的阻力作用,則下列 相關敘述哪些正確?(應選2項)(2分) a 0 Do b 共19頁 + + ASON话: 400元 x(cm) 3 (A) → b 的過程,彈簧給小球的彈性力漸增,且方向向下 (B) 6 → c 的過程,彈簧給小球的彈性力漸增,且方向向上 Va a→b的過程,小球的重力量值小於彈簧的彈性力量值,合力向火下小球向下加速 (D) b → c 的過程,小球的重力量值大於彈簧的彈性力量值,合力向下:(ko (E) 小球位於b 處時,小球所受的重力與彈簧的彈性力量值相等,方向相反,因此小球 所受的合力為零 OHUY 02 DECE X 16=2x10x) = 袋 (地球( 202-41 G 51.若a處的小球瞬時速率為4m/s,可推知小球最初距離彈簧上端的高度為h,而小球壓 縮彈簧在b處位置時,彈簧的壓縮量為x,則h:x=2:1-01- (重力加速度量值為10公尺/秒²) (4分) NOV MODE 00 2 myhkX ½xkxx² = -4 mg=kx) why? 古kxx 52 由於彈簧在比例限度內遵守虎克定律,F = kx,其中k為彈簧的彈性常數,x則為彈簧

請問這題怎麼算

如圖所示,固定在地面上的半圓軌道直徑 ab 水平, 質量P從a點正上方H處自由落下,經過軌道後從 b點衝出垂直上拋,上升最大高度為2H/3,不計空 氣阻力,當質點下落再經過軌道由a點衝出時,能 上升最大高度為,則下列何者正確?(A)h<H/3 (B) h=H/3 (C) H/3<h<2H/3 (D) h=2H/3 (E) h>2H/3 ° Ans:C Key:兩次滑過圓軌道的摩擦力作功是否相同? mg H- fid = mgs¹ fit- jmgH = bang H-1 wg #1 - my h DhjH (C) A. (B) PO H a b

請問第1題該怎麼算？

100) 反 1. ( \m²+1) X = m 數學第一冊 單元7 一年班號姓名 單選題 (B )設直線x + my-m=0與圓(+)-x=0相交於A,B兩點,若AB=1,試求 m 之值為 (A)√2 (B) (C)¹/2 (D)-2 (E)2 (010) EX m mx-y=0-2-4 M² X-myzu 4 xhg=h m²tl 2. ( )已知圓C:(x-2)²+(y+1)²=16,圓C被下列哪一條直線所截的弦最長? (A)*軸(B) 軸(C)x+y-3=0 (D)3x+4y=0 (E)2x-y=0 (21-1) 4 =X+/=/ 甜相机

第五題答案是B 想問不過這樣句子沒有動詞是可以的嗎

mud all over my face, I 4 found my glasses, they were broken. see anything! When I finally 5 from head to toe, I walked to school. When my classmates saw me, they all broke out into laughter. Yesterday, the only thing I could be sure was that the luck was not on my side. (C) hoped 991 (A) to hope 10C2 (A) motivated Lm B 3 (A) revision doobs A4 (A) could hardly (C) would rather BC (B) hoping (B) privileged fog (B) disaster sildug 5 (A) Wetly and dirtily (C) Wetted and dirtied (D) with hope (D) dissatisfied (D) publicity (C) embarrassed (C) formula (B) might as well (D) had no choice but to (B) Wet and dirty (D) Wetness and dirtiness

請問第2題該填什麼？

cormorant (1)(A) that (B) which (C) whom (D) whose (2)(A) carry out (B) turn out (C) come across (D) make sure (3)(A) since (B) though (C) whether (D) once ( (4)(A) to (B) for (C) with (D) × (C) (5) (A) keen (B) creative (C) specific (D) sensitive 4. Frédéric Auguste Bartholdi was a master sculptor. He studied architecture*, painting, and sculpting in _(1)___ the European style of the nineteenth century. his native France, and first produced bronze* works After sculpting a local military figure, he served in the army himself during the Franco-Prussian War of 1870. (2) however, his work after this war that he is most famous for. Bartholdi first visited America in 1871 (3) the idea of a large building project that could reflect the strong ties between the two nations. His "Liberty Enlightening the World" design was eventually* approved, and a special union was formed with the goal of raising money for the giant __(4)___. In the years to follow, Bartholdi worked on _(5)____ two decades for his dream to this project and other sculptures around America. In the end, it took be realized. On October 28, 1886 he finally introduced his Statue of Liberty to the world. 註:architecture 建築學 bronze 青銅 eventually 最終 (1)(A) on (B) by (C) in (D) to ) (2)(A) It is (B) Such is (C) They are (D) It has ) (3)(A) by proposing (B) to propose (B) tourist (C) globe (5)(A) due to (B) in addition to (C) close to (D) next to (C) of proposes (D) at proposing (D) monument 甜相机 (4)(A) slave 5. One of the greatest gifts France has ever given the United States is, of course, the Statue of Liberty. thig important New York landmark has been a popular_(1)___ and draws millions of

想問第9（怎麼翻都怪怪的(⁠@⁠_⁠@⁠)

II、綜合測驗 (1)__ a long 1. I'm a plastic bag. After I was born, I was sent from the factory to a shop. I waited time, until finally some kids took me to a beach. When it was (2)__ dark they left, but they forgot me! Then the wind ___(3)____ blew me into the sea. I floated around, but I wasn't alone. I had many plastic friends there! Then I went down a dark tunnel into a chamber. A fork (4)__ me told me that we were inside a fish. This fish swallowed more and more plastic things ___(5)__ it died. After its body decomposed, I was back in the ocean. (6) a wave threw me up onto the shore. Later, a student picked me up with a ____(7)____ of tongs. Before I knew it, I was inside an even bigger plastic bag. I heard a teacher say that plastic products often ____(8)____ in the ocean. The poisonous substances released by them can even harm people. _(9)____ the plastic bottle beside me, they are going to take us to a recycling factory. How strange! These humans produce us in order to ___(10)__ their lives better, and then misuse us. I hope that my next owner knows how to use me properly! ( C )) (1) (C) for (1) (2) (B) on (B) making (B) suddenly (C) keeping (C) actually (C) as well as (B) next to (B) while (B) Day by day (B) herd (C) when (C) Long before (C) pair (B) turn into (C) turn out (B) In addition to (C) According to (B) lead (C) get simple. You place recyclable things inside a bin. A few months later, they (A) to (A) leaving (A) wonderfully (A) far away (A) after (A) One day (A) sheet (A) end up ) (9) (A) That is (A) (10) (A) make dis () (3) () (4) (√) (5) () (6) (C) (7) (A) (8) cr R (D) at (D) turning (D) amazingly (D) by the way (D) until (D) From time to time (D) flock (D) pass out (D) Even though (D) trust