Let X be a matrix of rank m > k, let K be a matrix of rank k. Prove $\sigma_1(X-K) \ge \sigma_k(X)$
((3/2) ^ 3 * (2/5) ^ 4)/(9/4 * (2/5) ^ 3)
is s1(X-K) (biggest singular value) where K is of rank k >= sk(X)
100÷2,800
2((√3+√2)/(6√2))−1+3((√2+√3)/(4√3))−1
state the range of f(x)=-3x^2 for x <-1
7+7
12x+6
[ \lim_{x \to +\infty} (x + 2x){\frac{1}{x}} ]
𝑓(𝑥) = 10𝑥/𝑙𝑛(𝑥−21)−1