1 . ax2+b

• A. $5$
• B. $10$
• C. $15$
• D. $20$

Answer: Option B

Explanation:

2 . y=ax2+bx+c

• A. $\frac{d^{3}y}{d{x}^3}=0$
• B. $\frac{d^{2}y}{d{x}^2}+2a=0$
• C. $\frac{dy}{dx}+2ax-b=0$
• D. $\frac{d^{3}y}{d{x}^2}+\frac{d^{2}y}{d{x}^2}+\frac{dy}{dx}-2ay=0$

Answer: Option C

Explanation:

3 . ax2+b

• A. 5
• B. 10
• C. 15
• D. 20

Answer: Option B

Explanation: