Question

find the sum of first 100 natural number
​

Answer 1

Answer:

5050

Step-by-step explanation:

first 100 natural number are

1,2,3......100

a= 1

d=1

n = 100

a(100) = 100

S(100) = (100/2) ( 1+100)

=> S(100) = 50(101) = 5050

Answer 2

Answer:

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 +26+ 27 +28+ 29+ 30+ 31+ 32 +33 +34 +35 +36 +37 +38 +39 +40+ 41 +42 43 +44+ 45+ 46+ 47+ 48 +49+ 50 +51+ 52 +53 +54 +55 +56 +57 +58 +59 +60 61+ 62 +63 +64 +65 +67 +68 +69 +70 +71 +72 +73 +74 + 75 +76 +78 +79 +80 81+ 82 +83 +84 +85+ 86+ 87+ 88+ 89+ 90+ 91 +92 +93 +94 +95 +96 +97 +98 99 +100=35,003‬

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