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an = a1 + (n - 1 )d

The sum s
n of the first n terms of an arithmetic sequence is defined by 

sn = a1 + a2 + a3 + ... + a n

and is a
1 is given by 

sn = n (a1 + an) / 2

Problem 1: 
The first term of an arithmetic sequence is equal to 6 and the common difference is equal to 3. Find a formula for the n th term and the value of the 50 th term

ibahin nyo nalang ung question!

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