想問這題在幹嘛

6 (b) (d) 0 類題 (1) 觀察下列式子, n=1時,P=1, n=2時,1+2=9=(1+2)², n=3時,1+2+3=36=(1+2+3)², n=4時,1+2+3 +4°=100=(1+2+3+4)², n=5時,1+2+3+4° +5 = 225 = (1+2+3+4+5)², 8+ (0) 請推測出級數1+2°+3°+…+n之和。 公园花爬出翠(1) (2) 用數學歸納法原理證明(1)的結果對於所有自然數都成立。 ated 推測 更有共OS+ .. S+p>嫂 S 2 13+2+34...+H3=(1+2+3+..+n)² = [n(n+1)] = ca 2 12A 13 + 2³ +3³ + ... +h³ = [ n(n+1) )] ² 送+5 = 且, 王 每筆訂公,名為首圖一步〉號 h=1→13=(x2) 成立 > 2>T (3) T>23) (0) 12>20 (8) > 2>E (A) 3 今=K1+2+1+K: [K(K+1) ]2 成立 2 当 • po- mn = k+13+23+33+ ... + K3+(K+1)3 7 TE A 二 [K(k+1)]2+(K+1)3=(K+1)*xK+4K+4 2 4 嫂即服,這部劇首且,012 然(二(52)*x(K+1)- (²)*x(K+1)* = [(K+1)(K+2)] 由牧歸法成立 10+ pl 彼購訂的連島會一dpple 1024慈公旦選貨品資第一站爬嫂慈善一直 大量官,处 : =|a| 的值。 技 可利率2018年 版 D版作為 THROUNDE 第二章

一直有個疑問 反應前不是甲+乙變成丙+丁 那反應前這個詞 應該是配上甲+乙 反應後這個詞 應該是丁+戊 那為什麼甲乙丙丁戊加起來等於甲乙丙丁戊 反應前和反應後不是應該變一個次子嗎

甲+乙 成为丙+丁戊為陰化劑反應前後 物質「甲乙丙丁戊 質量不變 REEK 130 300016L 反應後「To AXIM 7 |4 X/Y#15277129

可以解釋一下解析的部分嗎，感謝各位😌

題題(1)有一等差數列的公差為4,第4項與第10項互為相反數,求其第9項。 已知一等差數列的末項為首項的13倍,反倒數第2項與有項的和等於第3 項與第6項的和,求第3項與第6項的比。 和 求第 2 解:

請幫我對答案 謝謝❗️

14.單字文法選擇卷 麻辣 年 卷 「班 27 1. There is no second way to win first prize. All you need is more (B) sweaters (C) problems (D) land singing last night, but I didn't know who she was. Her voice was 號 得分 姓名 Im (A) practice ad 2. I heard beautiful (A) anyone (B) everyone TI 3. Mr. Logan needs an excellent secretary u with everything in the USA. (C) someone (A) which (D) no one English is good enough to help him (B) whose (C) that (D) who 4. Nora: We need to hurry. The train is going to leave in five minutes. Tony: Don't worry. We are there. (B) perhaps (C) quite pasted the poster on the classroom door? Kim: I don't know. It's already there when I got here this morning. D (A) yet (B) 5. Ms. Liim: Who was the one (D) almost (B) repeat Lo (A) who (B) x (C) that (C) 6. I am sorry I didn't get your point. Would you please (D) which (A) prepare (C) answer what you just said? (m) © Jerry seldom has fast food, and (D) start (A) neither do I We eat a lot of fruit and vegetables. (B) neither has I (C) so do I (D) so has I (D) 8. This is the book I borrowed from the library. I just finished reading it. (A) what (B) who (C) whose (D) which (B) 9. Ms. Lee has told Sam many times, but he makes the same mistake again and again. (A) then (B) still (C) finally (D) over (D) 10. Uncle Joe's was the restaurant I usually had lunch when I studied in Taipei. (A) that (B) what (Q where (D) which ( 2.) 11. “Quiet" and "quite” look almost the same. It's not easy for some students to them right. (A) spell (B) dig (C) kick (D) wipe ( ( ) 12. I am sure Jack will like your idea about the trip to the UK. Just tell him. (A) who (B) whether (C) that (D) what (B13. I just that Mike lost his job, and I was so surprised. He didn't say anything when we had dinner last week. (D) kept (A) turned (C) learned (C) 14. Our math teacher always us to do a lot of homework. It's so tiring. (C) gets (D) studies (A) takes from her husband for two ( 0) 15. Nancy has to go on a business trip, so she will be months. (D) passed (A) parted V (B) made (B) asks (C) failed (B) marked

想請問這兩題的算法 謝謝！ （可以忽略我寫的🥲）

); 2 3 11. 設/(x) = -6x' + 29x'-26x'-14 +12,且f(x)=0有有理根和 2 3 解不等式 (1) <0。 b 12.設) = 70°-(A+13) + k-k-2的圖形與x軸交於兩點(a,0) 和(5.0), 且0<x <<<2, 求實數k的範圍。 y = 2(x - 2) CX-P) get=k+13. = 2x² -1646 J x 1708 Maß= 62-4-2

請問這題怎麼寫？

設k為正整數,坐標平面上一點P(-2.3)在圓 L:x^2+y^2+2kx-6y+3k+13=0的外部,則符合條件 的k有幾個?

求解，解析第二行的-2t𝝅是從哪來的？

x + 13 2- )的圖形可由y=sin2x 的圖形向右平移晉單位得到,若105k=20,則正整数 函数y=sin 2.x- 【高雄女中) T X- k元 12 = sin | 2x 解析:y=sin2x 向右平移得y=sin ka -2th,t為整數 一 k=1+12+,又10=k=20 k=13 POWERED BY 翰林教育科技

求解，解析第二行的-2t𝝅是從哪來的？

| 上一月 X 13 元 12 函數y = sin | 2.x- 的圖形可由y = sin2x 的圖形向右平移單位得到,若10<k=20,則正整數 6 【高雄女中) =sin(2(**2)) = sin(23-0) 解析:y=sin2x 向右平移得y=sin 12 -2th,t為整數 -2, 1-12 ) k=1+12t,又10=k=20 →k=13 POWERED BY 翰林教育科技

兩題求解

x.x2 + x,x: + x,x. + x,Xs = -2 X,X, + X,X: + X,X4 + X,X = -2 Ex10. 若xi, X., X, X., x, 皆為實數,且滿足{xxj + X, X. + X; X: + X X = -2, *4*, +X.X2 + X,X: +X X = -2 XsX, + XsX2 +X3X3 + X X 4 = -2 91 x,' + x,' + x;' + x,' + x, Zütik 13

想問這題的算法，謝謝🙏

已知圆C:(x-1)= +(y-2)=4及直線L:3.x +4y + k=0,且直線L與圓C相割,則 k的範圍為下列何者? (A) 9<k<13 (B) k<-13 或k>-9 (C) -21<k<-1 (D) k<-21 或k>-1。