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Given the first 2 terms A1 and A2 of an Arithmetic Series.Find the N^{th} term of the series.

**Example 1:**

**Input:**
A1=2
A2=3
N=4
**Output:**
5
**Explanation:**
The series is 2,3,4,5,6....
Thus,4th term is 5.

**Example 2:**

**Input:**
A1=1
A2=2
N=10
**Output:**
10
**Explanation:**
The series is1,2,3,4,5,6,7,8,9,10,11..
Thus,10th term is 10.

**Your Task:**

You don't need to read input or print anything.Your Task is to complete the function **nthTermOfAP()** which takes three integers A1,A2 and N as input parameters and returns the nth term of the AP that has A1 and A2 as the first and second terms respectively.

**Expected Time Complexity:**O(1)

**Expected Auxillary Space:**O(1)

**Constraints:**

-10^{4}<=A1,A2<=10^{4}

1<=N<=10^{3}

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Series AP

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