Question

find the sequence of 1,2,3....100 find n​

Answer 1

Answer:

5050

Step-by-step explanation:

S=1+2+3+4+5+6+……………. +95+96+97+98+99+100.

S=(1+100)+(2+99)+(3+98)+(4+97)+(5+96)+……………..+50 terms.

S=101+101+101+101+101+101+………………….50 term

S =101×50 = 5050. Answer.

Second - method:-

S=1+2+3+4+5+6+…………………….+100.

This is an A.P. in which a=1 , d=1 ,n=100 .

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

S100 = 100/2.[2.1+(100-1).1]

= 50.[ 2+99]

=50×101 = 5050. Answer.

Answer 2

Answer:

n=100

Step-by-step explanation:

THE FORMULA FOR n is

$n = \frac{l - a}{d} + 1$

where

l=100

a=1

d=2-1=1

substitute these values in the formula

n= (100-1)/1 + 1

n=(99/1)+1

n=100

BETWEEN 1 TO 100 THERE ARE 100 TERMS.