alan30
alan30
02-09-2017
Mathematics
contestada
how to find the sum of 2+4+6....+40?
Respuesta :
KhaiLi
KhaiLi
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.
Answer Link
VER TODAS LAS RESPUESTAS ( 23+ )
Otras preguntas
Crop yield is the ratio of the number of bushels harvested to the number of acres used for the harvest. This year, the harvest at a farm was 9,396 bushels of so
If (x − 5) is a factor of the polynomial function f(x) = 3x2 − 23x + 40, which of the following is another factor?
Freud believes that defense mechanisms are reactions people have to protect themselves from uncomfortable feelings. The article ""High on Anxiety"" suggests tha
What is the value of x?
________ can contain stacked images, text, and other elements which collectively comprise a Photoshop file.
Why was European interest in African colonies renewed after World War I?
PLEASE HELP ME MATH IS HARD Use the rectangle shown in the coordinate plane to answer each question. 1. Rotate rectangle KLMN 90º counter-clockwise about the or
Find S.P. in the following cases. a) M.P. = Rs 540, discount = 5 %
The world as we know it has three dimensions of space—length, width, and depth—and one dimension of time. But there's the mind-bending possibility that many mor
Felix’s Feed Mill sells chicken feed for $8. 00 per bag. This price is no longer high enough to create a profit. Felix decides to raise the price. He is conside
