Question

If a is the first term, 1 is the common difference and b is the last term of an AP , then its sum is ​

Answer 1

Arithmetic Progression

[A.P]

In the formula [mentioned in attachment]

→ n represent last term/term whose value you want to find.

→ a as first term in Arithmetic Progression [A.P].

→ Comman different is 1.

→ “a” will replace a and b will replace n.

→ In Sb, S stands for sum of terms in A.P and b for nth term.