Math, asked by kripalkalathiya, 8 months ago

find the value of 1+2+3+..........+105

Answers

Answered by Anonymous

23

Answer:

a=1

d=1

an=105

an=a+(n-1)d

105=1+(n-1)1

105=1+1n-1

n=105

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

=105/2(2+(104*1)

=105/2(106)

=105*53

=5565

Answered by krishnaroy90

4

Step-by-step explanation:

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