求解析謝謝🙏！

+(²x)=-=-=2x-31 | 已知一次函數f(x)滿足f(3)=2,f(3)=7,求f(3")的值。 3x f(x) = ax+b -D f(3²) = 2 = 3² xa+b - 5 = a (3⁰-3²) f/z²)-2-2²²rathe 312 1 1952 tal. ++

56題~🥲

56. (a) Prove that tang 1-X 1+ X lim 17-1 211, and 2 Z X) 22 lim f(x) = lim f(1/t) 818 t->0+ lim_ f(x) = lim_ f(1/t) 8118 t→0- B assuming that these limits exist. (b) Use part (a) and Exercise 50 to find lim x sin 50+ X

求解 簡單

产分 一選擇題:每題6分,共12分 1. 下列五個函數中有多少個為「指數型成長或衰退」的函數? 3 X 1 0 3 2 10 12 14 f(x) 16 14 12 10 2 1 0 X f(x) 8 #KIN X f(x) (A) 1 個 ||2|3 51901 1359060 | 40 (B) 2 個 0 2104 X f (x) (C) 3 個 1 0 2|3° 0 149 (D) 4 個 the 1 0 X 2 3 f(x) 40 6090 135 ET (E) 5 個 1355

16 thanks 😊

13-16 Find the intervals on which f is concave upward or concave downward, and find the inflection points of f. 13. f(x) = x³ − 3x² − 9x + 4 14. f(x) = 2x³ — 9x² + 12x − 3 15. f(x) = sin²x − cos 2x, 0≤x≤ T 16. f(x) = x √√x − 4 -

請問這一題要怎麼解？

X+6+3)+( 2. 如右圖,P(-2,h)處有一光源(h>0), T:84yy=1,y≥0為半圓 形障礙物,若光線要照到Q(2,0),則h至少需為 P(-2,h) THEO ® Q (-2,0) | (2,0) -X

《空間向量》 請問一下DE沒有和BG歪斜嗎？

力測 驗 * £) =A<p_{NE 直線中,與直線 GB 互為 WE TH AP LOSOS (C) 4 EF THE DH 1 be E A 為A、B、C、D、E, º這個正立方體截出一面 中縣坐間空 出三 B F B E C G C D

想問最上面那題的“keep”可不可以換成“stay”呢？謝謝🙏

Game 4.1 每天閱讀報紙是讓心智保持活躍和及時掌握時事的好方法。 current events great keep abreast of Reading newspaper every day is a active mind energnic and keep abreast of current events. 4.2 報紙上的填字遊戲和數獨(Sudoku)也是很好的腦力鍛鍊,可以讓人消磨時間。 ( keep the good way to stay your The crossword puzzles and Sudoku are also good mental exercise [ can let people killed time.] for in the newspaper <that allow people to kill time. have Collecting baseball cards 5.1 自從我成為棒球迷,我一直在蒐集棒球卡。 been -ing [Since I became a baseball fan] I continuely collectect

求解法(＞人＜;)

如圖,有一撞球檯,一球自 4(6,1) 先撞至檯邊上一點B,經反彈後再碰至 檯邊上一點 C,最後通過D(2,7),則直線 BC 方程式為 ( THE D(-) A(6,-1) 以又為對師大附中】 ND' = (0-0)(Ho) VECO 12² B AL r

請問這題謝謝！（附答案）

SO HEL Example 3 Find y' if sin(x + y) = y² cos x. Solution : Differentiating implicitly with respect to x and remembering that y is a function of x, we get y' 日日 cos(x + y) (1 + y) = y²(- sin x) + (cos x) (2yy') (Note that we have used the Chain Rule on the left side and the Product Rule and Chain Rule on the right side.) If we collect the terms that involve y', we get cos(x + y) + y² sin x = (2y cos x)y' - cos(x + y) · y' y² sin x + cos(x + y) 2y cos x cos(x + y) - < 清除

請問為什麼錯🙏

(C) what any brake is used for 62. William Lee, AD Diake is usca 10 a knitting machine that rattled out 1,000 to 1,500 stitches a minute at the end of the 16th century. (A) an English curator, developed (B) developed an English curator, (C) an English curator, which developed (D) an English curator, developing 63. Canada has two official languages, B (A) they are French and English (C) which they are French and English (B) French and English (D) French and English they are