Question

Here is a sequence of numbers.
7,
5,
3,
1,
-1,
...

Find an expression for the nth term of this sequence.
​

Answer 1

Answer:

an = a+ (n-1)d

an =7+(n-1)-2

Answer 2

Answer: a =7. d= 5-7= -2. n =9 An = a+(n- 1)*d

Thus, 7 +(9-1)*-2. = -9

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