JAMB - Mathematics (2011 - No. 32)
The derivatives of (2x + 1)(3x + 1) is
12x + 1
6x + 5
6x + 1
12x + 5
解释
2x + 1 \(\frac{d(3x + 1)}{\mathrm d x}\) + (3x + 1) \(\frac{d(2x + 1)}{\mathrm d x}\)
2x + 1 (3) + (3x + 1) (2)
6x + 3 + 6x + 2 = 12x + 5
2x + 1 (3) + (3x + 1) (2)
6x + 3 + 6x + 2 = 12x + 5