一些數學JJ 1. equilateral triangle 内接于一个圆内。Triangle的面积是9倍根号3。问你圆的面积是多大。 2. x=-1 n是前243個prime number的總和~問x+x^n+x^(n+1)+x^(n+2)
3. S^6V^3T^7<0 (應該是這樣), 問SVT<0
a. v>0 b. t<0 4. (0.8)^-5/(0.4)-4= ANS: 5/64 <---GWD有寫 5. If a and b are intergers, is b even <---GWD a. 3a+4b is even b. 3a+5b is even ANs: C
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