Question

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

Answer 1

the answer choices A. 180 B. 200 C. 220 D. 240

Answer 2

I'm really having trouble understanding your problem? Can you be more clear what your expression is?

Answer 3

the 4 is at the top of the huge E, under neath it it says i=1, next to it in parenthesis it says (2i + 61^2)

Answer 4

so you mean to say this:
\[\sum_{i=1}^{4}(2i+6i^2)\]

Answer 5

yesss

Answer 6

you can use some formulas
are you can just plug in and then add the terms
either way for this one since there isn't many terms

Answer 7

evaluate the expression 2i+6i^2
for i=1
for i=2
for i=3
for i=4

then you will have four terms
add them

Answer 8

have you plugged in 1 for i in the expression 2i+6i^2?

Answer 9

yes i got36

Answer 10

38

Answer 11

2+6 isn't that big

Answer 12

dont you have to multiply each term by 2?

Answer 13

is it 2i+6i^2?

Answer 14

and what about the square root?

Answer 15

yes

Answer 16

if so only the i is being multiplied by 2
and only i^2 is being multiplied by 6?

Answer 17

you mean square
i don't see any square roots

Answer 18

2 is the square root of 6i

Answer 19

you have 2i+6i^2

plug in 1 for i like this
2(1)+6(1)^2
follow the order of operations


wait what?
2 is not the square root of 6i
that is impossible

Answer 20

idk thats what is says

Answer 21

a square root looks like this:

you are saying \[2=\sqrt{6i}\]
i have no clue where you are getting that from

Answer 22

2 does not equal square root of 6i