Recent content by SOHAWONG

thx a lot! so,would it only happen in vector-valued function?

Q:Suppose that r1(t) and r2(t) are vector-valued functions in 2- space. Explain why solving the equation r1(t) = r2(t) may not produce all of the points where the graphs of these functions intersect. In usual function,i always find the intersection by f(x)=g(x) but how come we can't...

thx a lot,problem fixed finally

after typing these following code when running this code error occurs,but the editor doesn't indicate me where's the problem

a.(b - c) = 0, when b doesn't equal c this i'd thought once,but don't know how to express anyway thank you very much :p

zero =[ btw,when we want some example for conradiction,we should use some real number to think about it first?

assume b is not equal to c l.h.s=a‧b =... should i express the dot product?

the method i have tried is really useless?

1.Determine if it is true that for any vectors a, b, c such that a is not equal to 0 and a‧b = a‧ c, then b = c. i tried to let a‧b-a‧c=0 then a‧(b-c)=0 but i found it's not meaningful so how can i solve it =[ thz

what does gcd mean?

yes, but how to prove?:confused:

no,i may add despite 1,4,9,16,25...etc

when X is even number,it's easy to prove but how about the condition which X is odd number? I have no idea of this

In a question,I found a unit call 'viscosity',but i don't what it is can anyone explain the definition,I have no idea of this completely,THX

thx!The mind is clear now,but I don't under stand the lower half diagram