Question

write the formula for sum of n term of an AP qnd explain each letter in it
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Answer 1

Solution:-

The sum of n terms of Arthemetic Progressions is given by :

$\boxed{\red{\bf{\:\:\dag\:S_n=\dfrac{n}{2}\bigg(2a+(n-1)d\bigg)}}}$

$\tt Where$

• Sn is sum of series .
• n is number of terms.
• a is first term
• d is common difference