大神求解🙏

度 阱 8 改 正解: 科目:Math 考題章節:數列禦級數, 題目: 已知數列 (an)的首項a=1,an+1=2an, 令Sn= a, as*+ as*-af.....+azn-1²-aan² 求sn等於下列哪一個選項 (A) }(2²-1) (B) (1-2") 10) = (1-2²) (C) (D)5(1-27) (E) 亨(1-2h) 正解: 重要程度: 重點整理與

大神求解🙏

日期: 8/28 複習次數 正 錯題原因 粗心 熟練度 題目陷阱 基本概念 日期: 其他: 複習次數 科目:Math. 考題章節:數列與級數. 題目: 設 <bn> 是由正數所組成的等比數列且 k 65 x b6 = 9, 若b, xbxb3 x .... xbo : 3 22·lk = 10. 正解: 科目: 題目: 考題章節: 1 重要程度: 重點整理與備註 重要程度: 重點整理與備

請問這題怎麼解？題目：求二次函數最小值，未知數在分母。

例 B 求f(x)=x²+ 16 在x= x+1 時,f(x)有最小的函數值為 142 K

求二次函數最小值，但未知數在分母，不知道怎麼解。希望能幫忙解答，謝謝！

例 B 求f(x) = x^+ 16 x² + 1 在x= shid 時,f(x)有最小的函數值為 CUID

12 解一半卡住了😺

= (2x-1)=3(y+1)= x + ₂(x+1)= x+y+1 2 2(x+1)=247+1 +2-2-34-3=0 42-3y = 5m@ (4x-31=5 2x²-y=1-x3-→ 3x-3X=3 12. 子芮、彥汝二人解同一個二元一次聯立方程式(ax+by=2......... ¹ [cx - 7y=8₁···(2) 解為x=3、y=-2;彥汝將c看錯,得其解為x=-2、y=2,則a= b= ; c= ^3a-2b = 2 苏: 3c+14-8 2742=2+7+1 x-Y=120 3c = -6 C = -2 - 29+2b=2 CDKEV-50-MATH 3000 子芮得正

第四題怎麼寫？

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請問第20為什麼D🥲🙏

er 7. ice we 度 Time (D) We will be happy to help you. 9 16 23 (19~21) Fiona goes to a summer school this year. Here's the schedule with the notice of the summer school. Day Mon. AB Tues. Wed. 9:30~10:30 English Math English 10:40~11:40 Baseball Tennis Tennis Thurs. Fri. Notice: 1/3~1/28 1. Please wear sports shoes when playing tennis or baseball. Please Science Music Baseball Baseball 2. During the summer school (From July 3rd to July 28th), the gym is for the school basketball team for baseball or tennis classes. schedule H 19. How many baseball classes a week does Fiona have at the summer school? (A) One. (B) Two. (C) Three. How long is the summer school open? (A) For one week. (D) Four. (B) For two weeks. (C) For three weeks. (D) For four weeks. 21. Fiona said something to her friend about the summer school.

「B4翰林數學3-5三角形邊&角關係」在線求解！！尤其是四邊形這一題，我自己是先連結BD但是又不知線段AB和線段CD的長度🥲🥲

如右圖,四邊形ABCD 中, AD 最短, BC 最長,則: (1) ∠ABC與∠ADC 的大小 關係為何? (3分) B D C

「B4翰林數學4-1截線」想請問這題！在線求解！

如右圖,L // L,若∠1=63°, 則∠2+∠3+∠4+ ∠5= 度。 1 4 5 -L₁ -L₂

「B4翰林數學4-3梯形」在線求解！！

如圖,梯形 ABCD 中,AD // BC 且 AB 1 BC,若 AD=1,BC=6,CD=13,今自C點 剪出 CE,使得CE將梯形分成兩塊面積相等的圖形,則 AE = A E B P 。