The Constant Solution Of $\frac { d x } { d t } = 2 x ^ { 2 } + y ^ { 2 } - 1 , \frac { d y } { d t } = x - 2 y$

question 24

Multiple Choice

The constant solution of $\frac { d x } { d t } = 2 x ^ { 2 } + y ^ { 2 } - 1 , \frac { d y } { d t } = x - 2 y$ are

• A) \(x = 2 / 3 , y = 1 / 3\)
• B) \(x = 2 / 3 , y = 1 / 3\) and \(x = - 2 / 3 , y = - 1 / 3\)
• C) \(x = - 2 / 3 , y = - 1 / 3\)
• D) \(x = 2 / \sqrt { 7 } , y = 1 / \sqrt { 7 }\)
• E) \(x = 2 / \sqrt { 7 } , y = 1 / \sqrt { 7 }\) and \(x = - 2 / \sqrt { 7 } , y = - 1 / \sqrt { 7 }\)

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