Given y = xy + x^2 +1, first find y = f(x) = (x^2 + 1) / (1 - x). Then use the quotient rule for derivatives.
dy/dx = [( 1 - x)( 2x) - (x^2 + 1)(-1)] / (1 - x)^2. Substitute the value of x = -1 into the above derivative and get -1/2.
A. 1 1/2
B. 3 5/7
C. 15 1/2
D. 6
E. 2/11
Answer:
3/4
Step-by-step explanation:
2/5+1/4+1/10=8/20+5/20+2/20=(8+5+2)/20=15/20=3/4
Answer:
Increasing: -10<x<-8. 8<x<10. -2<x<0.
Deacresing: 3<x<7.
Neither Increasing nor decreasing: -8<x<-5