Asked by happy

4,9,x,37 is a quadratic sequence (a)show that x=20 (b)determine the nth term of the sequence thanks in advance

Answers

Answered by Steve
quadratic sequences will have linear 1st differences and constant 2nd differences.

The 1st differences here are 5,x-9,37-x
The 2nd differences are x-14,46-2x

If x=20, that makes the 1sts: 5,11,17
and the 2nds 6,6

which is consistent.

I expect you can determine the nth term all right...
Answered by Basetsana
4du
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