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Review title: error on page 121, and this book is garbage
Product review: on the top of page 121, it should be=(f1)(f2') - (f1')(f2)im not reviewing this at the moment, because Differential Equations is fing toughedit*please dont buy this pos. this book is 23 years old filed with errors in the book and in the answer book.you are better off learning from free third party sources with newer books
