Final answer:
The expression is undefined when v = -3.
Step-by-step explanation:
To find all values of v for which the expression (7v+1)/(2v+6) is undefined, we need to identify the values of v that make the denominator (2v+6) equal to zero. Set the denominator equal to zero and solve for v:
2v+6=0
2v=-6
v=-3
So, the expression is undefined when v is equal to -3. Therefore, the values of v for which the expression is undefined are -3.