1 Find the sume sum of all even natural numbers upto 74(1) 1518(4) 140

1.	1 Find the sume sum of all even natural numbers upto 74(1) 1518(4) 1406(3) 1618(2) 1471(5) of these2t is 28% of that number
Answer» All natural numbers before 74 can be arranged to form an AP, Where a=2 an=74 d=2 an=a+(n-1)d 74=2+(n-1)2 72=(n-1)2 36=n-1 n=37 Sn=(n/2)[2a +(n-1)d] = (37/2) [22+(37-1)2] =(37/2)(4+72) =(37/2)(76) =3738 Sn=1406 Plz snd number My no 9596523078

1 Find the sume sum of all even natural numbers upto 74(1) 1518(4) 1406(3) 1618(2) 1471(5) of these2t is 28% of that number

Answer»

All natural numbers before 74 can be arranged to form an AP, Where

a=2

an=74

d=2

an=a+(n-1)d

74=2+(n-1)2

72=(n-1)2

36=n-1

n=37

Sn=(n/2)[2a +(n-1)d]

= (37/2) [2*2+(37-1)2]

=(37/2)*(4+72)

=(37/2)*(76)

=37*38

Sn=1406

Plz snd number

My no 9596523078