Question

find the sum of the first 200 natural number?​

Answer 1

Step-by-step explanation:

To find the sum of the arithmetic sequence a

n

from 1 to 200 we can use this formula:

S=

2

n(a

1

+a

n

)

where s is the sum , n is the number of terms , a

1

is the first term and a

n

is the last term

S=

2

200(1+200)

S=

2

200(201)

S=100×201

S=20100

Answer 2

Answer:

20100 is the sum

Step-by-step explanation:

1, 2, 3,......, 199, 200.

given sequence is in AP,

First term (a) = 1

last term (l) = 200

nth term = 200

Sum (Sn) = n/2 × (a+l)

Sn = 200/2 × (1+200)

Sn = 100×201 = 20100