Let $z = x y + x ^ { 2 } y$

question 192

Multiple Choice

Let $z = x y + x ^ { 2 } y$ , and let $x$ and $y$ be functions of $S$ and $t$ with $x ( 0,0 ) = 1 , y ( 0,0 ) = 2$ , $\delta x / \delta s = 3$ , and $\delta y / \delta s = 4$ at $( s , t ) = ( 0,0 )$ . Find $\delta z / \delta s$ when $( s , t ) = ( 0,0 )$ .

• A)21
• B)22
• C)23
• D)24
• E)25
• F)26
• G)27
• H)28

---

Definitions:

Potential Customers

Individuals or organizations that could become purchasers of a product or service but have not yet done so.

Product's Superiority

Product's superiority refers to the characteristics or features of a product that make it better in quality or more desirable than its competitors.

Specific Needs

Particular requirements or desires of individuals or target markets that products or services aim to fulfill.

Public Relations

The strategic communication process that builds mutually beneficial relationships between organizations and their publics.