ANSWER THIS QUESTION FOR A MEDAL
The first five terms in a quadratic sequence are shown below.
3, 9, 19, 33, 51,...

What is the nth term in the sequence?
A. 3n2 + 1
B. 2n2 + 2
C. 2n2 + 1
D. n2 + 2

Question

ANSWER THIS QUESTION FOR A MEDAL 
The first five terms in a quadratic sequence are shown below.
                   3, 9, 19, 33, 51,...

What is the nth term in the sequence?
	A. 3n2 + 1
	B. 2n2 + 2
	C. 2n2 + 1
	D. n2 + 2

anonymous · Answer

Best way for you to do is to plug in to each choice.

amistre64 · Answer

or a difference tier

3,   9,      19,      33, 51,
   6     10       14
       4       4

3 + 6n + 4n(n-1)/2 , to start at n=0

3 + 6(n+1) + 4n(n+1)/2, to start at n=1

amistre64 · Answer

might be a -1 .... 

3 + 6(n-1) + 4(n-1)(n-2)/2

anonymous · Answer

so whats the answer ? @amistre64

ganeshie8 · Answer

u may use wolfram directly if u want just the answer http://www.wolframalpha.com/input/?i=3%2C+9%2C+19%2C+33%2C+51%2C...&dataset=