數學 高中 1年以上以前

問第二題怎麼算🙏

指數方程式 Share my experience with classmates (ĦI ) a¹(x) = q8(x) (II) Variable transformation : Ex22. 解下列方程式:(1)(3)*+' = 273. 解答 (1)2;(2)1 nir M. (1) 3-4(70²1) 2755 - 2²3² (3^) (3*) ^ +(3*) -3 -36 =(3x+1) TIN 23/12x12/12/2 X 1 X- Ex23.解下列夕卞和 a>0 a#1 IN →f(x) = g(x) N (2)9x+3x+1-18=0. Ex2

數學 高中 約2年以前

請問一下這一題我的列式錯在哪裡

7. 連續投擲一公正骰子2次,以X表示出現點數的和,求X的期望值與變異數。[7, 35 E(X+) = /(1+4+9+16+25+36) =1 T E(X) = 3.5 E(X)=7 Var(2x) = E(4x²)-E12x)=364 -496 6 二 70 = tº ·]

英文 高中 5年以上以前

第20題為什麼是B

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