想問這題

1. 在半徑6公尺的半圓中開闢一個內接矩形ABCD 的苗圃,且 AD 與直徑重合。其中O為圓心,設 OA=x公尺, AB =y公尺。 (1)試求x,y的關係式。 (2) 試問此苗圃的最大面積為多少? (3分) (6分) B y A D

求解

(3) - O REDMI NOTE 8 PRO AI QUAD CAMERA 1 1- √√2 2

help2!!!😁

O REDMI NOTE 8 PRO COAI QUAD CAMERA 解】 小值。 12.漁夫想要開挖一個矩形的魚塭,已知此魚塭的面積為16平方公尺,求此魚塭周長的最 tthe-hat={N-4-X ) (3+√3) 1. 數

help!!!

國郵 單元1 實數 3~5 樓體育館旁 樓梯(含 4,5 - 延伸- √9-√80 11.已知x、y為有理數,且x-V14+ √180 = y( 9 - √80 + 4,求x與y的值。 解 √14+ √180 = √√₁4+²√4x² = 3+√JE √9-0500 = √₁ 座號’ 12 NOTE 8 PRO O REDMI COAI QUAD CAMERA

想問一下第三題為什麼不能選A，謝謝🙏

(A) change (B) changed 2. By the time the new semester begins, notebook computer. - All (C) have changed (D) had changed enough money to buy a new (A) save (B) will save ) 3. It is comfortable to take the high-speed train. (A) In consequence (B) In other words (C) For another 分,共25分 (C) have saved (D) will have saved a lot. (D) On the other hand the ticket costs

想問11.(4)跟13.(4)(5)

高二數學新課綱 複習作業 11. 設有10 筆(x,y)的資料,若x=6,4y=7,ox = 4,oy=2,且相關係數r = 0.8,則: v(1)-3x+5,3x2+5, 3xg+5之標準差為12 5 5 2 , (2) -=-3x, ² (2)-x^+2 : *2+2, 5 x+2之算術平均數為30 9 9 (3)利用最小平方法求出之迴歸直線的斜率為0.4 (4)若加進二筆資料(1,5),(11,9),則其相關係數必大於0.8 Ans:(1)(3)(4)

求（c)的解法~

20.設(1+x)" = a+ax+ax²+……+ax",其中a,a,a2, 者正確? ✓(A) a₂ + a₁ + a₂ +...... • + an = 2" (B) a <a₁ <a₂ < < A₂ (C)若a:ang=3:2,則n有兩組答案 (D)當 n=10 時,9,9,92,……, a 中恰有兩個數比10小 v(E)112011的百位數字為6 (1 fett | n " a皆為整數,下列何 Ans:(A)(D)(E)

想問這兩題~（9.有窮解之外的解法嗎？

19. 0,1,2,3,4,5,6,7,8,9組成三位數,若數字不可重複,其中有幾個3的倍數? 《解》3的倍數:和為3的倍數 ①和為子:(01112) Ⓒ4096 (0,1,5), (0₁2,4), (1121) ③和為9:10.118) (0.217)、(013,67.014.5) (1,216)、(1,3,5)、(2,3,4) ④和為12:(013,9)、(414,8) (015,7)、(11219)、(11358)、(1,4,7), (1,516) : Ans: 228

請問為什麼第一題是practicable 而不是capable><

are one billion nanometers in one meter, you can get an idea of how impressive this technology really is! Even though this fabulous technology has been around for almost 100 years, we have only recently been able to experience both its benefits and i cogmignal ovil Asqa niso I e maoney but also area Stopesugar have characteristics These days, nanotechnology is used primarily to make things stronger, stiffer, and smoother. Due to their tiny size, nanoparticles increase the overall surface a of an object, and that acts to give the object special properties However, nanotechnology is also used in the field of biochemistry. One possible of nanotechnology in the future is in the field of robotics. It might be feasible for tiny nano-robots, or "nanobots," to be produced that could easily perform tasks in a very small scale. Each of these nanobots would be so small that you would need a special microscope to see them. Because of their small size, however, a great deal of them DEST OF 90 MOBST U simple math, inc ped programa Cindy a button nose Qué oyes, would be needed to perform a task. furod One drawback to nanotechnology is that the structures are so small that they pose some health and environmental risks. Because of their size, they can float around in the air and enter our lungs without our knowing about it. The effects of this are not yet known, but in the future, if the use of this sort of technology becomes more common, some specialists believe that we may suffer from various illnesses. Regardless of the risks, however, it seems that nanotechnology is something that will be with us for a long time. davol odi ni "11" nuomong ot D Tolo hazards. or (A) affordable (B) practicable (C) visible 14 What does the passage mainly discuss? (A) A new technol use 13 The boldfaced word "feasible" in paragraph two is closest in meaning to ghib10:56 Ap (D) capable

請問9.的答案為何是-4，以及12.的（5）要怎麼判斷

12.設實係數二次函數f(x)=ax² + bx + c,若f(0)> f(1)>0,且f(-1)<0則下列何者正確? (1) a>0 ˇ (2) b>0 V(3) c> 0 ✓(4) b² − 4ac > 0 (5) ƒ (2) > 0 《解》 f(0) = C > 0 f(1) = a+b +670 f(t) = a-btu <o _ // 70 = a<o, b>0 fo) f(-1)9 ¨; f(x) ³²³ × 5 ² = 0 >0 = 6²-4²² > 0 F53 Ans:(2)(3)(4) A : (-²) (3) (4)