Question
The first four terms of a sequence are
7, 11, 15, 19, …
[5 marks]
7, 11, 15, 19, …
(a)Find an expression for the nth term of the sequence.
(b)Find the 50th term.
(c)Show that 201 is NOT a term of this sequence.
This question has 3 parts. You don't have to get them all — each part you answer earns its own marks. Write them as (a) … ; (b) … , or just send the one part you worked out.
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