1. Take derivative with respect to x: (2x+7)(x-9) A. 4x-11 B. 4x+11 C. -4x-11 D. -4x+11

2. Take derivative with respect to x: (a+bx)(c+dx) a,b,c,d are constants. A. bc+ad+2bdx B. ab+cd+2acx C. ab+cd+2bdx

3. Take derivative with respect to x: (a+bx)(c-dx) A. bc-ad-2bdx B. bc+ad-2bdx C. bc-ad+2bdx D. bc-ad-2acx

4. Derivative with respect to m: y-vm. y, v are constants. A. v B. -v C. y-v D. y+v

5. Derivative with respect to m: (100-m)(50+vm). v is a constant. A. 100v-50+2vm B. 100v-50-2vm C. 100v+50-2vm D. 100v+50+2vm

6. Derivative with respect to m: (y1-m)(y2+vm). y1, y2, v are constants. A. -y2+vy1-2vm B. -y2+vy1+2vm C. y2-vy1-2vm