Find the first-order partial derivatives of: z = 40x2 + 29x²y2 + 6y² дz дz ( А. = 80 + 58y²; = 58y + 12 Әх ду дz О) в. = 80x + 58xy2 58x2y +12 дх дz ду дz О C. az = 80x+58xy; 1 = 58xy +12у ?х о D. Əz = 80x + 58x²y, 1 = 58xy+12y ах ду

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