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Linear algebra and geometry

Linear algebra and geometry

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Let the function be given, describing the growth of a population between 1790 and 2014. Observing the function plot, which of the following assertion can be deduced to be correct?

the population in 2100 will be equal to ;

the population will grow starting from 2014;

the population in 2100 will be lower than ;

none of the alternatives;

the population in 2100 will be greater than ;

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The instruction "which filename":

prints the owner of "filename"

prints the comment lines inside function "filename"

prints the name of the last user that modified "filename"

returns an error

locates the file or function "filename" inside the Matlab search path

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Which of the following commands creates the linearly spaced vector of elements between and ?

x=linspace(0,1,8)

x=linspace(0,1,10)

x=0:0.2:1

x=linspace(0,8,1)

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Given the vectors and of length , how would you compute the vector whose components are ?

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We want to create a vector containing the odd numbers between 31 and 75. Which of the following instructions is correct?

x=linspace(31,75,100)

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For a given number , which of the following options allows to obtain a number m=n+1 if n>1 and m=n-1 if n<=1?

if n>1 m=n+1; elseif m=n-1; end

if n>1 m=n+1; else m=n-1; end

if n>1 m=n-1; else m=n+1; end

else if n>1 m=n+1; else if m=n-1; end

if n>1 m=n-1; elseif m=n+1; end

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You want to tabulate the function and plot it in . Which of the following instructions is correct?

x=linspace(1,2,10); y=x.^2+log(x); fplot(x,y)

x=linspace(1,2,10); y=x^.2+log(x); plot(x,y)

x=[1:0.1:2]; y=x^2+log(x); plot(x,y)

x=[1:0.1:2]; y=x^2+log(x); fplot(x,y)

x=linspace(1,2,10); y=x.^2+log(x); plot(x,y)

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The instruction "help myfun":

prints all comment blocks inside the file defining function "myfun"

displays the online documentation of function "myfun"

returns an error

prints the content of function "myfun"

prints the first comment block after the definition of function "myfun"

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Let x=[3, 6, 1, 9, 9, 8] and y=[8, 4, 5, 2, 1, 5], which result is returned by (x >= y) | (x > y) ?

[0, 0, 0, 0, 0, 1]

[0, 0, 1, 1, 1, 1]

[0, 1, 0, 1, 1, 1]

an error message is returned

none of the alternatives

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Consider the vector x=[2 5 1 6]. Which of the following instructions allows to sum 3 to odd index elements?

x(1:6:2)+3

none of the alternatives

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