emmaward919 emmaward919

07-07-2017
Mathematics

contestada

What is the value of the summation ∑i=14(2i+6i2)

Respuesta :

RickyChen RickyChen

07-07-2017

You need to know the following:

sigma(i) = 1/2 * i * (i+1)

sigma(i^2) = 1/6 * i * (i+1) * (2i+1)

Therefore, the answer should be 14( i(i+1) + i * (i+1) * (2i+1)) = 14i(i+1)(2i+2) = 28i(i+1)^2

Answer Link

Otras preguntas

Find the range of the function: f(x) = x + 3, for x ≠ 1

1. [10 points) A business consultant wanted to investigate if providing day-care facilities on premises by companies reduces the absentee rate of working mother

China and Japan were forced to sign a _______. [definition: a condition that is required by a treaty or law.] .

Why does the moon appear dark from space? But why does it appear bright when observed from earth, especially when it is full moon?

how did rome become a great power

Model of diaphragm during inspiration andexpirchion

I’m on the last part of B and it would be really helpful if someone help me fill out this. I only have a couple of hours so if anyone is good at french please h

What is the most common structure in which a biography is written? cause and effect order of importance chronological order problem and solution

3. Angay isang uri ng kuwentong bayan at panitikanna nagsasalaysay ng mga pinagmulan ng mga bagay-bagaysa daigdigA. Horror B. AlamatC. PantasyaD. Mga tula

move down one screen