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3 results
Result: y = C * x^2 2. Apply the Method of Variation of Constants: Assume C is a function C(x). 3. Substitute y = C(x)x^2 and its ...
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8 hours ago
Email:penglaipacking@gmail.com postmaster@penglaipacking.com WhatsApp us @ +8615811882441 Technical structure ...
16 hours ago
Email: jackdu999@penglaipacking.com jackdu999@yahoo.com WhatsApp: +8615811882441 Website www.penglaichina.com ...
60 views
18 hours ago
