Show that ∇· (∇ x F) = 0 for any vector field [duplicate]
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real analysis - Prove: if $f(0)=0$ and $f'(0)=0$ then $f''(0)\geq 0 ...
2016年7月11日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
Finding the value of $f'(0)$ - Mathematics Stack Exchange
2016年12月24日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
functions - If $f (f (x))=x^2-x+1$, what is $f (0)$? - Mathematics ...
2016年11月2日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
functions - What does$ f(f(x))=0$ mean? - Mathematics Stack …
2021年6月29日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
$f'(x)=f(x)$ and $f(0)=0$ implies that $f(x)=0$ formal proof
2013年5月30日 · Below I show how the standard proof (e.g. egreg's answer) is a special case of more general results on uniqueness theorems and Wronskians.
derivatives - If $f(0)=0$, can I say that $f'(0)=0$ as well ...
2017年12月16日 · A function property holding at a single point or at all points are two very different issues. The derivative of a function requires the knowledge of infinitely many values …
Let f be a differentiable function with f (0)=0 and f (1)=1, f' (0)=f ...
2017年6月18日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
functions - proving that if $f(x)$ odd then $f(0)=0$ - Mathematics ...
$$\text {Applying the definition: }\ f(0)=-f(0) ,$$ $$\text {so if}\ f(0) =c≠0 \text{ you would have two different values in x=0, c and -c}$$ $$\text {which is clearly impossible, so you must have }\ …
SOLUTION: How do you solve questions like f(0)=2, f(2)=4 and …
How do you solve questions like f(0)=2, f(2)=4 and write an equation for the linear function? That's the same problem as Find the equation of the line that passes through the two points (0,2) and …