Mathematics · Differential Equations
माना एक दिए गए वक्र पर सभी बिंदुओं पर अभिलंब (normals) एक निश्चित बिंदु (a, b) से होकर गुजरते हैं। यदि वक्र बिंदुओं (3, -3) और (4, -2√2) से होकर गुजरता है, और यह दिया गया है कि a - 2√2 b = 3 है, तो (a2 + b2 + ab) का मान बराबर है:
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