28510170

Jamil Silva
9 h · Fortaleza · Editado
a(1) = 28
a(2) = 5
a(3) = 10
a(4 ) = 17
a(5 ) = ?
CurtirCurtir ·
Selwin Raj Manoharan e Akash Bosu curtiram isso.

Mona Alashy 2
8 h · Curtir

Aayat Khan 2or26
8 h · Curtir

Jamil Silva not
8 h · Curtir

Aayat Khan what
8 h · Curtir

Aayat Khan both r wrong?
8 h · Curtir

Jamil Silva the correct answer is not 2 or 26
8 h · Curtir · 1

Jamil Silva post edited: Review their answers
8 h · Editado · Curtir

Selwin Raj Manoharan 26
8 h · Curtir

Jamil Silva no
8 h · Curtir

Jamil Silva What is the formula?
8 h · Curtir

Selwin Raj Manoharan Hey jamil i thnk that it would be wrong
8 h · Curtir

Jamil Silva Why ?
8 h · Curtir

Selwin Raj Manoharan Bcoz it is so difficult na thats y. . . . . . . . . .
8 h · Curtir

Rojer Shetty Prove it..
7 h · Curtir

Jamil Silva prove what, Rojer Shetty ?
7 h · Curtir

Jamil Silva the formula is: https://i.imgur.com/5l3Mf0i.png

a(n) = 5(n - 1) + (n - 2)(n - 3) + (-13/3)(n - 2)(n - 3)(n - 4)

or

a(n) = (315 - 338n + 120n² - 13n³)/3

or

a(n) = (1/3)[(5 - n)(13n² - 55n + 63)]

i.imgur.com
i.imgur.com
2 h · Editado · Curtir · Remover visualização

Rojer Shetty How did you derive it?
7 h · Curtir

Rojer Shetty Initially I mean
6 h · Curtir

Diego Alvariz 26
6 h · Curtir

Quadir Ansari Are bur ke bar kau hom jahangir bhabha banata
6 h · Curtir

Sk Narendra Narendra what is the formula
6 h · Curtir

Jamil Silva Sk Narendra Narendra, the formula is: http://i.imgur.com/WJuFAvj.png

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.

a(n) = (-13/3)n³ + 40n² + (- 338/3)n + 105

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.

or

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a(n) = (5 - n)(13n² - 55n + 63)/3
.
.

or

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a(n) = 5(n - 1) + (n - 2)(n - 3) - 13(n - 2)(n - 3)(n - 4)/3

.
.

i.imgur.com
i.imgur.com
2 h · Editado · Curtir · Remover visualização

Rojer Shetty How did u get it? Derive it I mean?
6 h · Curtir

Manjiri Dixit 26
6 h · Curtir

Chintala Chaitanya 26
3 h · Curtir
Jamil Silva