It is known that a and B are negative real numbers, and 1 / A + 1 / B + 1 (a-b) = 0. What is the value of B / a?

It is known that a and B are negative real numbers, and 1 / A + 1 / B + 1 (a-b) = 0. What is the value of B / a?

Let B / a = T1 / T-T + 1 = 0t ^ 2-t-1 = 0. According to the root formula, we get t = (1 ± √ 5) / 2. Because a and B are all negative numbers, B / a = (1 + √ 5) / 2

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