Question

Find the sum of odd numbers till 63 natural numbers

Answer 1

Heya mate, Here is ur answer

AP: 1 , 3 , 5........63 .

a=1

d= 3-1

=2

an=63

a+(n-1)d =63

1+(n-1) 2 =63

(n-1)2=63-1

(n-1) ×2 =62

n-1=62/2

n-1 = 31

n=31+1

n=32

Sn= n/2(a+an)

$= \frac{32}{2} (1 + 63)$


$= 16 \times 64$

=1024

Hence the sum of odd natural numbers till 63 is 1024 .

Warm regards

@Laughterqueen

Be Brainly ✌✌

Answer 2

Sum = n/2 x (a + Tn)
= 63/2 x (1 + 125)
= (63 x 126)/ 2
= 7938/2
1 + 3 + 5 + 7 + 9 + .  .  .  .   + 125 = 3969

Therefore, 3969 is the sum of first 63 odd numbers.