- #1
rmiller70015
- 110
- 1
Lim (x, y)->(0,0)(X^3+y^3)/(x^2+y^2)
The answer is -1, but I can't get it there. Here is what I did.
((Rcosx)^3 +(rsinx)^3)/((rcosx)^2+(rsinx)^2)
Then by factoring out a r squared from top and bottom I'm left with a denominator of (sin^2(x ) + cos^2 (x)) which simplifies to 1. And a numerator of:
Rcos^3(x)+rsin^3 (x)
This is about as far as I've gotten and I can't figure out how to get it to a -1.
The answer is -1, but I can't get it there. Here is what I did.
((Rcosx)^3 +(rsinx)^3)/((rcosx)^2+(rsinx)^2)
Then by factoring out a r squared from top and bottom I'm left with a denominator of (sin^2(x ) + cos^2 (x)) which simplifies to 1. And a numerator of:
Rcos^3(x)+rsin^3 (x)
This is about as far as I've gotten and I can't figure out how to get it to a -1.