0
I think that you're doing the same thing that I did for IB. Here's what I think you're asking for :
0, 2, 6, 12, 20, 30, 42...
c₁ = 0
c₂ = 2
c₃ = 6 (c₂ + 4 = 2 + 4 = 6)
c₄ = 12 (c₃ + 6 = 2 + 4 + 6 = 12)
c₅ = 20 (c₄ + 8 = 2 + 4 + 6 + 8 = 20)
c₆ = 2 + 4 + 6 + 8 + 10
etc...
dn = (n/2) <2c₁ + (n-1) 2>
dn = (n/2) <2 (2) + (n-1) 2>
dn = (n/2) (4 + 2n - 2)
dn = (n/2) (2 + 2n)
dn = (2n/2) + (2n²/2)
dn = n + n²
Still curious? Ask our experts.
Chat with our AI personalities
Steve
Rafa
CoachAdd your answer:
Earn +20 pts
Who invented surd's?
i did
Is root 2 a surd?
Yes the square root of 2 is a surd which is an irrational number that can't be expressed as a fraction.
What does surd mean in maths?
A surd is an irrational number that can't be expressed as a fraction as for example the square root of 2
Can you give one example for surd which is not irrational?
It is impossible to have a surd that is not irrational. Surds are defined to be an irrational number (square root of a number).
Is the square root pi is surd?
Yes.
