IDNStudy.com, ang iyong destinasyon para sa mabilis at eksaktong mga sagot. Anuman ang kahirapan ng iyong mga tanong, ang aming komunidad ay may mga sagot na kailangan mo.

What is the sum of all the odd integers between8 and 26?

Sagot :

the answer here is 153

first, use an=a1+d(n-1) with a1= 9, and an=25,
take note that we need odd numbers, therefore, d=2, since there is 2 common difference between 2 odd numbers (i.e. 3, 5 <-- 5-3=2)

solve for n, you have 9

then use
sn=[n(a1+an)] / 2 with n=9, a1= 9, an=25

solv it, youll get 153