What is [math]\displaystyle \lim_{x \to 0} \frac{1-\cos x }{x^2} [/math]?
What is [math]\lim_{x \to 0} \frac{(1+x)^{15} - (1-x)^{15}}{(1+x) ^9 -(1-x)^9}?[/math]
מה זה [math]\displaystyle \lim_{x \to 0} \frac{1-\cos x }{x^2} [/math]?
מהו [מתמטיקה]\lim_{x \to 0} \frac{(1+x)^{15} - (1-x)^{15}}{(1+x) ^9 -(1-x) ^9}?[/math]