English
Hindi
8. Sequences and Series
easy

$1 + 3 + 5 + 7 + …n$ પદ સુધી =…..

A

$(n + 1)^2$

B

$(2n)^2$

C

$n^2$

D

$(n - 1)^2$

Solution

${\text{1  +  3  +  5  +  7 + ……… }}{\text{.n}}$ પદ સુધી $ = \frac{n}{2}[2(1) + (n – 1)2]\,\,$

$\, = \frac{n}{2}.2n\,\,\, = {n^2}$

 

Standard 11
Mathematics

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