Find the 20th term of the AP 7, 11, 15, 19, ...

Step 1: Identify the first term and common difference

In an Arithmetic Progression (AP), the first term is denoted by $a$, and the common difference is denoted by $d$. We can find the common difference by subtracting any term from its succeeding term.

Step 2: Recall the formula for the nth term

The formula for the $n$ -th term of an Arithmetic Progression is $a_n = a + (n-1)d$, where $a_n$ is the $n$ -th term, $a$ is the first term, $n$ is the term number, and $d$ is the common difference.

Step 3: Substitute values to find the 20th term

Now, we substitute the values of $a=7$, $d=4$, and $n=20$ into the formula for the $n$ -th term. We then perform the arithmetic operations to find the value of the 20th term.

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