Find the points on the lemniscate where the tangent is horizontal. 2(x

1.	Find the points on the lemniscate where the tangent is horizontal. 2(x2 + y2)2 = 81(x2 - y2)
Answer» Find the points on the lemniscate where the tangent is horizontal. 2(x² + y²)²= 81(x² - y²) Solution:

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