Summary:: finding concetrations
[Thread moved from the technical forums]
i did a lab experiment and i'm a little confused about what i should do.
i got a solution of CaCl(2) 1.5 gr and Ca(OH)2 5gr in 100ml that i prepared 2 weeks ahead
. after filttering the solution i got a saturated...
last week i did a chemistry lab. i mixed NaOH 0.03M with equal part of methyl violet and mesured aborbance in a spectrophotometer. then i did the same thing with a 0.05M and methyl violet
i did today the graphs and got the k' =-0.1647 for the first solution and k'=-0.4022 for the second...
Summary:: finding ml of two solutions by the final pH
i have a NaOAc 0.1M and HOAc 0.1M , together the volume of the solutions is 20ml and the pH is 4. I need to find the volume of each solution.
I've tried to solve it for hours with no successes. i found the H+ concentration (-log(h)=4 ), it...
an element (we will call it X) got a cofiguration of 1##s^2##2##s^2##2##p^6##3##s^2##s##p^3## what molecule is moste likely to happend between this element and Mg?
1.MgX
2.##Mg_2##X
3.Mg##X_2##
4.##Mg_3## ##X_2##
how do i do it?with lewis structure?just check what structure makes the most...
What I wanted to do was set f(x)=##x^2##/2 - xcosx+sinx And show that f(x)>0.
f'(x)=x(1+sinx)
First I wanted to prove that f(x)<0 in the interval (0,∞)
0≤1+sinx≤2
And thus for all x> 0 f'(x)≥0 and therefore f(x)≥f(0)=0
And it doesn't help me much because I need to f(x)>0
I need help only in section 3
I have some kind of solution but I'm not sure because it seems too short and too simple.
We showed in section 1 that an> 0 per n.
it Given that a_n + 1 <0 and a_n+1<\frac a_n a_1 In addition therefore a_1 <0 is warranted
I need help only in section 3
I have some kind of solution but I'm not sure because it seems too short and too simple.
We showed in section 1 that an> 0 per n.
Given that an + 1 <0 and an + 1 = an / a1 therefore a1 <0 is warranted
It all makes sense to me, but I don't know how to formalize it nicely.
I wanted to divide it into two cases.
First case where f is fixed in the segment.
And a second case where f is not fixed in the segment.
But I don't know how to prove it for the case where f i is not fixed
What I've tried is:
I have defined a function g(x)=f(x)-x^2/2. g Differentiable in the interval [0,1] As a difference of function in the interval.
so -x≤g'(x)≤1-x for all x∈[0,1] than -1≤g'(x)≤0 or 0≤g'(x)≤1 .
Then use the Intermediate value theorem .
The problem is I am not given that f' is...
I'm not sure that inff(0,∞)=0 can help But that was the first section of the question so I thought to point it out anyway.
I'm not sure what I'm supposed to do or what I'm supposed to show.
I was thinking of using the right environment of 0 where f aims for infinity but I don't know how it...
The first thing I thought about doing was to prove that f is continuous using the Heine–Cantor theorem proof.
But I do not know at all whether it is possible to prove with the data that I have continuous.
I would love to get help.
Thanks
There are two parts to the question Let's start with part :)
I understand the definition of Uniform continuity And I think I'm in the right direction for the solution but I'm not sure of the formal wording.
So be it ε>0
Given that yn limyn-xn=0 so For all ε>0 , ∃N∈ℕ so that For all N<n ...
Here's what I tried to do:
f Continuous function at R, x1 local minimum point of f, x2 local maximum point of f.
Existing f(x1)>f(x2).
Let's look at the interval [x1,x2]⊆ℝ .
f is continuous in R and therefore continuous in its partial segment. Therefore f continuous in [x1,x2].
Therefore, there...
Homework Statement:: I don't understand what I need to write here
Homework Equations:: I don't understand what I need to write here
hello :)
I recently posted a post and it was deleted because I did not comply with forum rules.
Now I'm trying to figure out what to do right.
So I want to ask...
be f Differentiable function In section [0,1] and f(0)=0, f(1)=1. so:
a. f A monotonous function arises in section [0,1].
b. There is a point c∈[0,1] so that f'(c)=1.
c. There is a point c∈(0,1) where f has Local max.
I have to choose one correct answer.
I came across the following question:
If g and f are uniform continuity functions In section I, then f + g uniform continuity In section I.
I was able to prove it with the help Triangle Inequality .
But I thought what would happen if they asked the same question for f-g
I'm sorry if my...