02-09-2017
Mathematics

contestada

how to find the sum of 2+4+6....+40?

Respuesta :

02-09-2017

Answer 420.
a, is the first term. d is difference.
Since this is an arithmetic progression, I use this formula.
Un = nth term
Sn = sum of terms.
First find the number of terms, which is 20.
Then use the second formula to find the sum.

Ver imagen KhaiLi

Answer Link

Otras preguntas

which structure is found in the cytoplasm of a typical plant cell?

Evaluate the interpretive thesis statement below. In his Sonnet #130, Shakespeare uses unfavorable comparisons between his mistress and symbols of beauty to par

x = 6 is a solution to the inequalityx – 5 < 10 True or False

definition of human rights

What is an implicit message in this transcript from a news radio program? Lee Wu: Welcome back to News Time. I'm your host Lee Wu, and with me today is reporter

A TV has a listed price of $864.98 before tax. If the sales tax rate is 9.75%, find the total cost of the TV with sales tax included. Round your answer to the n

¿Cómo puede el río cambiar el lugar de la topografía?

A recipe uses 100 g of flour, 100 g of sugar and 80 g of butter. 8. Damia has 120 g of butter and wants to use it all in this recipe. What total weight of flou

please help this is the last question!!!!

hnori please help me with this one