nth term of an Arithmetic Sequence

The nth term of the arithmetic sequence 1, 6, 11, 16, ... is

• 5n - 4

• 4n - 5

• 5n + 1

• 4n + 1

The 50th term of the arithmetic sequence 4, 7, 10, 13, ...is

• 151

• 149

• 150

• 161

How many terms does the sequence 1, 2, 3, 4,...99 have

• 99

• 100

• 48

• It's not possible to answer this!

How many terms does the arithmetic sequence 2, 4, 6, 8, ...112 have?

• 61

• 62

• 60

• 56

What is the simplified equation for the nth term of the arithemtic sequence:

18, 12, 6, 0, -6, ...

(Express your answer in A(n) = ax + b where a and b are integers)

Find the 42nd term of the arithmetic sequence 25, 28, 31, ...

How many terms are there in the arithmetic sequence

15, 19, 23, 27, 31...263

The 5th term of an arithmetic sequence is 37 and the 11th term is 61. Find the first term of the sequence.

 $\sum_{n=1}^42x-15\ =?$  

 $\sum_{x=2}^4\left(x^2+1\right)$