Question

find the sum of all the odd integers between 100 and 300​

Answer 1

Answer:

99

Step-by-step explanation:

the answer is 99 because there are 200 no. in it half oft os 100 -1 99

Answer 2

Answer:1980

Step-by-step explanation:

the series of odd integers between 100 and 300 is

: 101,103,105................299

now first term(a)=101

last term(l)=299

common difference (d)=2

so by formula

nth term of ap i.e. (l)= a+ (n-1)d

we get n= {(299-101)/2} + 1

so n=198/2=99

now in an ap sum of n terms i.e 99 terms=

n/2(a+l)=99/2(101+299)  = 200*99=1980

hence your answer is 1980