Discover Questions

Why are "initial 1's" (as in 101) not counted as significant (unless second digit is more than 5)? (in determining significant digits).? Different ways to regulate metabolic pathways? True or false: In hypothesis testing, it is never valid to form a conclusion of supporting the null hypothesis.? Need help with recurrences!
MATH/COMPUTER SCIENCE RELATED
Problem is attached? Find the equation of the tangent line of x^3+y^3-xy=7 at (2,1)?