Question

1+2+3......100 find sum​

Answer 1

Answer:

an=a+(n-1)d

100=1+(n-1)1

(n-1)=99

n=100

Sn=n/2(a+an)

100/2(1+100)

50×101

5050

plz mark as brainliest

Answer 2

Answer:

FORMULA =

$n( \frac{n + 1}{2} )$

n = 100

$100( \frac{100 + 1}{2} )$

$50 \times 101$

$= 5050$

hope it helps........