Question

y=(1-x)/(1+x) at (-2,-3)

i suppose to find equation at tangent line

the answer i got is y=-2x-7

Answer 1

Sure, did you get the derivative?

Don't use quotient tho

Answer 2

but my professor answers are all positive

Answer 3

yes

Answer 4

his answer is 2x+y+7=0

Answer 5

(1-x)/(1+x) = (-x+1)/(x+1)= (-x-1+2)/(x+1)=(-x-1)/(x+1) + 2/(x+1) = -1 + 2/(x+1)

Answer 6

i'm thinking he wrote it in implicit form and changed everything arounf

Answer 7

y = -2x-7 is same as
2x+y+7 = 0

Answer 8

so you and your prof, both are correct

Answer 9

ok