1. Find the central force necessary to make a parti- cle describe the lemniscate r2 = a² cos 20, where %3D a is a constant.
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![1. Find the central force necessary to make a parti-
cle describe the lemniscate r2 = a² cos 20, where
a is a constant.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb171a314-9915-4efd-81f0-27717f1f1f89%2Ff4a12fb2-5957-4364-85b8-8ab34ba14095%2F8z0uve_processed.jpeg&w=3840&q=75)
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