Current location - Training Enrollment Network - Mathematics courses - Xueba helps me to see how to choose the last question in this math final exam, 12. I have no idea. I am a freshman.
Xueba helps me to see how to choose the last question in this math final exam, 12. I have no idea. I am a freshman.
f？ (x)=(x？ +x+ 1)/x x & lt； - 1
= 1+ 1/x+ 1/x？
f？ (x)=- 1/x？ -2/x？ Stationary point x=-2 or so+is the minimum point minimum value f? (-2)=?
lim(x→-∞)f？ (x)= 1→f？ (x)∈∩[7/4，+∞)
(There is something wrong with the topic, and the known condition a≥0 is missing)