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Ummm but it is in the domain of g (x) why not consider that?Because x = 2.5 is out of the domain of f(x).
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Ummm but it is in the domain of g (x) why not consider that?Because x = 2.5 is out of the domain of f(x).
Actually the value of f(x) is to be put into the function g(x). If some value is not valid for f(x), it will not be considered.Ummm but it is in the domain of g (x) why not consider that?
Ooh yeah got it thanksActually the value of f(x) is to be put into the function g(x). If some value is not valid for f(x), it will not be considered.
The thing to note here is that the values of f(x) are the domain for g(x). Meaning that for finding gf(x), first the value of x will be put into f(x), then the resulting value of f(x) will be put into g(x) to calculate a value for gf(x). Got it?
Okay forget modulus.
We wanna find the area of triangle, so we'll take AC as base. To find the distance AC, we can use the distance formula (from coordinate geometry) or simply think about it. The line is vertical, so we just need to find the difference in i components of A and C. You'll get 2*sqrt(2).
For the height part, we just measure the horizontal distance between B and A, which is simply the difference in x coordinates of them, or the difference in real part of the numbers. That gives you 5*sqrt(2). Hope that's clear.
Edit: since you know all the coordinates, you can also use the Shoelace Formula for finding its area.
I'm not sure what exactly you mean by y-coordinate and "iota" part.So for y coordinates is it important to mention iota? Thanks a lot btw, got the rest.
Why is cos^2x = 0 if dy/dx is 0 for stationary point?
I'm not sure what exactly you mean by y-coordinate and "iota" part.
We want to make dy/dx zero. Setting cos^2(x) = 0 is a very convenient method of achieving this. This is because cos^2(x) was a factor of dy/dx. Hope that made sense.
Well if you make it clear that you are treating A and C as coordinates then I think there is no need to mention i. But if you are treating them as complex numbers and finding the modulus of the "complex number" AC, then you should mention i. The formula for modulus is |s| = sqrt(ss*)U mentioned 2sqrt2i so I was asking is it important to mention i when calculating length of y axis?
Also i cant understand the cos^2 part. Cant u include the 4 with it? Is there any other way of solving it?
i may fail in S1 i really need help
I answered this question, there is no 1.9+b herei didnt understand the last step ofk ur asnwer
u found probabillity of being between 1.9-b and 1.9+b
then what should e do with 80%
You know I felt the same way when I started stats but I kept on doing papers and kept on getting bad marks.But then I felt confident after I had done about 10-15 papersi may fail in S1 i really need help
I DONT GO TO SCHOOL i stopped privates tutionYou know I felt the same way when I started stats but I kept on doing papers and kept on getting bad marks.But then I felt confident after I had done about 10-15 papers
But if you just do the papers without understanding it isn't gonna help. Why don't you ask your teachers to explain your doubts to you I'm sure it will be much clearer to you then.
help in IIView attachment 59995
View attachment 59996
in I why o.256^4 why not 0.256*4
i cant do anything in II
Well if you make it clear that you are treating A and C as coordinates then I think there is no need to mention i. But if you are treating them as complex numbers and finding the modulus of the "complex number" AC, then you should mention i. The formula for modulus is |s| = sqrt(ss*)
As for your second question. Whenever you wanna solve any algebraic equation of the form f(x) = 0, and f(x) is given in factors, then you can set these factors as zero. This is because 0 multiplied by anything is equal to 0. For example:
(X-2)(X-3) = 0
So either (X-2)= 0 or (X-3) = 0
If there was a constant factor:
4(X-2)(X-3) = 0
We wouldn't say 4=0 because we know that's not true. We only take VARIABLE factors to be equal to zero if it is possible.
In your question we wanted to set dy/dx equal to zero, and cos^2(X) happened to be a factor of it. If a value of X is such that cos^2(X) = 0, then this guarantees that dy/dx is also equal to zero.
ok now i enderstood ur answer sorryI answered this question, there is no 1.9+b here![]()
help!View attachment 59995
View attachment 59996
in I why o.256^4 why not 0.256*4
i cant do anything in II
NO offence but the sort of questions you're asking are very basic which means you haven't quite understood the concept. So you need to do that first before doing past papersI DONT GO TO SCHOOL i stopped privates tution
why dont go to school well i dont have enough time so i am posting my qs hoping that someone will help and thanks for anyone who help
You need to plan and categorize your study.i may fail in S1 i really need help
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