Write a function so that, when given a natural number N, the function returns the value max n ∈ N : 12 + 22 + · · · + n 2 ≤ N
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Write a function so that, when given a natural number N, the function returns the value max n ∈ N : 12 + 22 + · · · + n 2 ≤ N
4 commentaires
Walter Roberson
le 22 Jan 2017
So the question is about finding the largest n such that the sum of squares of 1 to n is less than or equal to the original number? Hmmm, plausibly.
It would have been easy enough for the poster to have clarified that when asked a year ago.
Réponses (4)
Andrei Bobrov
le 17 Jan 2016
your_function = @(n,m,N)sum((n+m):n:N);
use
>> n = 10;
m = 2;
N = 90;
>> your_function(n,m,N)
ans =
376
>>
Rusty
le 17 Jan 2016
function [ p ] = rusty( N)
a(1)=12;
i=1;
while sum(a(:))<=N
a(i+1)=a(i)+10;
i=i+1;
end
if sum(a(:))>N
a(end)=[];
end
if isempty(a)
disp('N is less than 12');
return
else
p=(a(end)-2)/10
end
3 commentaires
Rusty
le 18 Jan 2016
you just go and save this file. now open the command window and write : rusty(36), if N=36, and you will get the answer
Márcio
le 20 Oct 2022
Write a function that for a given natural number nn returns the matrix which has 2 rows, in its first row every entry is 1, while in its second row there are the numbers n,n−1,…,1n,n−1,…,1 (in this order).
1 commentaire
Torsten
le 20 Oct 2022
N = 3624;
v = N:-1:1;
A = [ones(1,2*N);[v,v]]
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