The sum 1 + 3 + 11 + 25 + 45 + 71 + up to 20 terms is equal to:

Sequence and Series: JEE Main 2025 Mathematics question

JEE Main 2025 · April, Unspecified (session-level dataset) · Q82

JEE Main 2025April, Unspecified (session-level dataset)MathematicsMediumSequence and Series179× since 2002

The sum

1 + 3 + 11 + 25 + 45 + 71 + \dots

up to 20 terms is equal to:

JEE Main 2025 · April, Unspecified (session-level dataset) · Q82

JEE Main 2025April, Unspecified (session-level dataset)MathematicsMediumSequence and Series179× since 2002

The sum

1 + 3 + 11 + 25 + 45 + 71 + \dots

up to 20 terms is equal to: