阿摩線上測驗
4. ( ) Known a, b, c are side of ∆ABC and loga 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.
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統計： A(3), B(8), C(5), D(6), E(0) #3108321
統計： A(3), B(8), C(5), D(6), E(0) #3108321
