Ok maths geeks me exam on monday care to help me with a question?

Question

what is the nth term for the sequence: 1, 2, 5, 10 ... thanks :) its bugging me. i can't do it. im gonna fail.

Answer 1

n^2-2(n-1)

Answer 2

25

Answer 3

17

2-1=1

5-2=3

10-5=5

Difference is moving up in twos

therefore 5+2=7

10+7=17

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The maths geeks are in the maths section......

Answer 4

1+n^2

Answer 5

dont know really but im guessing randomly

1-2= 1

2-5= 3

5-10=5

so going with the odd numbers is the next....

17?

Answer 6

the answer is

n^2-2n+2

so the first term is 1^2-(2*1)+2 = 1

second term is 2^3-(2*2)+2 = 2