今日錯題測驗-教甄◆數學-阿摩線上測驗

阿摩：光榮的傳統可以繼承，輝煌的成果要靠自己打造

75分

(15 秒)

模式:今日錯題測驗
科目:教甄◆數學

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1(B).

1. ( ) How many pairs of positive integers (x, y) are there satisfying x² + y²= 6x + 8y?
(A) 4
(B) 5
(C) 7
(D) 12

2(C).

2. ( ) Given f(x) = x³ + 3x² − 2. How many distinct real roots of f(f(x))?
(A) 3
(B) 5
(C) 7
(D) 9

3(D).

4. ( ) Known a, b, c are side of ∆ABC and log_a b is a double root of equation x² − 2x + ?inC + c??C = 0 then which is correct in the followings?
(A) acute triangle
(B) equilateral triangle
(C) obtuse angled triangle
(D) isosceles right-angled triangle.

4(B).

5. ( ) Choose the correct relations of the values of following definite integrals.

(A) I₁＜ I₂, I₃ ＜ I₄
(B) I₁＜ I₂, I₃ ＞ I₄
(C) I₁ ＞ I₂, I₃ ＜ I₄
(D) I₁ ＞ I₂, I₃ ＞ I₄

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