Question

find the sum of odd numbers between 0and50​

Answer 1

Step-by-step explanation:

Odd number between 0 and 50 are 1,3,5,7,9.....49

l=a+(n-1)d

49=1+(n-1)2

2n-2=48

2n=50

n=50/2

n=25

Sn=n/2(a+l)

=25/2(1+49)

=25/2(50)

=25(25)

=625.

Therefore the sum of all odd numbers between 0 and 50 is 625

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Answer 2

$\large \bold{ \underline{ \underline{ \: Answer : \: \: \: }}}$

$\to$ 625

$\large \bold{ \underline{ \underline{ \:Explaination : \: \: \: }}}$

Odd number between 0 and 50 are 1 , 3 , 5 , 7 , 9 ..... 49

$\huge{ \star}$ nth term = a + (n - 1)d

$\to$ 49 = 1 + (n - 1) 2

$\to$ 48 = 2n - 2

$\to$ 50 = 2n

$\to$ n = 50/2

$\to$ n = 25

$\huge{ \star}$ Sum of nth term = n/2 (a + l)

$\to$ Sum = 25/2(1+ 49)

$\to$ Sum = 25/2(50)

$\to$ Sum = 25(25)

$\to$ Sum = 625

$\therefore$ The sum of all odd numbers between 0 and 50 is 625