## 30 Reputation

4 years, 284 days

## worksheet...

@Thomas Richard how do I upload my maple working or worksheet here? I do not know how to do it. Can you please guide me.

## @nm yes, <2298, -531, -160,...

@nm yes, <2298, -531, -160, -503, 579> is the correct answer. Can you help me with the second part which is to find M. TIA.

## @nm I am not sure, i dont get ...

@nm I am not sure, i dont get how it works, I still am trying to learn it. I have pasted the question as it is from the assignment.

## I am sorry I missed the informat...

I am sorry I missed the information. This is the whole question.

Suppose that

u1=<388, -635, -480, 554, -288, 732, -118>

u2=< -987, 789, 487, -919, 248, 994, -807>

u3=-316, -470, -522, -769, -159, 629, 806>

u4=<381, 740, -834, 722, -46, 49, 795>

a) Find the dot product of u1 and u2. Enter your answer in the box below.

u1⋅u2=

b) Suppose that A  is the matrix whose columns are these four vectors in order, i.e.

A=(u1∣u2∣u3∣u4) .

Let v   be the vector <74,55,-61,-89>. Hence Av   is a linear combination of the form

λ1u1+λ2u2+λ3u3+λ4u4.

Enter the values of λ1, λ2, λ3, λ4 in the boxes below.

λ1=       ,  λ2=     , λ3=    , λ4=   .

Suppose that Av=(b1  b2  ⋯  b7)^T .

Enter the value of b1  in the box below.

b1=

## does not work. gives error. What would b...

does not work. gives error. What would be the answer?

## correction...

@Carl Love

step1: assume(c>0)
f:=(8*sin(x)+11*cos(x))*exp((-5/2)*c*x)

step2: int(f,x=0..infinity)
step3: ans1:=(2):'ans1'
step4: limit(c*ans1,c=infinity)

But I am getting infinity as the final answer which is wrong. can you point out or make corrections please? My deadline is tomorrow.

## Abs...

The abs command expects only 2 arguments, its not working with 5 @Carl Love

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