Question

1 se lekar 200 tak add karna hai continuously like 1+2=3​

Answer 1

Answer:

8(1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25)

Answer 2

Answer:

20100

Step-by-step explanation:

use the formula to find the sum of:

1+2+3+...+n=n(n+1)/2

so,

here n=200

so,sum=200(200+1)/2

=100*201

=20100

derivation of the above mentioned formula:

S=1+2+3+....+n-2+n-1+n

S=n+n-1+n-2+....+3+2+1

adding them we get,

2S=(n+1)+(n+1)......n times

S=n(n+1)/2