1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andreyandreev [35.5K]
2 years ago
8

I need help finding the answer to this question on edge.

Mathematics
1 answer:
Aliun [14]2 years ago
6 0

Answer:

6

Step-by-step explanation:

We need to evaluate :-

\rm\implies \displaystyle\rm\sum^4_n   (-1)^n (3n + 2 )

Here the \Sigma is the sum operator . And here we need to find the sum from n = 1 to n = 4 . We can write it as ,

\rm\implies (-1)^1 ( 3*1 +2) + (-1)^2 ( 3*2+2) + (-1)^3(3*3+2) + (-1)^4(3*4+2)

Now we know that for odd powers of -1 , we get -1 and for even powers we get 1 . Therefore ,

\rm\implies -1 ( 3 + 2 ) + 1 (6+2)+-1(9+2)+1(12+2)

Now add the terms inside the brackets and then multiply it with the number outside the bracket . We will get ,

\rm\implies -1 * 5 + 1 * 8 + -1*11 + 1*14 \\\\\rm\implies -5 + 8 - 11 + 14 \\\\\rm\implies\boxed{\quad 6 \quad}

<u>Hence</u><u> the</u><u> </u><u>required</u><u> answer</u><u> is</u><u> </u><u>6</u><u>.</u>

You might be interested in
Write a problem that the expression 3(-7) -10 + 25 = -6
Sav [38]
This is true because the answer is -6 = -6
7 0
3 years ago
Read 2 more answers
A basketball is thrown upwards. The height f(t), in feet, of the basketball at time t, in seconds, is given by the following fun
Kruka [31]

Answer:

Well I think it is A because domain is the x values.

Step-by-step explanation:

So when you plug this in your calculator (mine is a ti-84 plus ce) you would hit graph. After it graphs it press Zoom, 0 to center it then press 2nd, trace which pulls up parabola menu's. Press 0 and find the left bound, right bound and then press enter which would give you x values of 2.9375 < t< 6

At the same time I don't know if this is right. I never really excelled at parabolas just trying to help.

8 0
3 years ago
Read 2 more answers
What is the pattern 1 white bead then three blue beads then 1 white bead
Keith_Richards [23]
1 white bead 3 blue beads 1 white bead 3 blue beads 1 white bead 3 blue beads.... it just keeps going
6 0
3 years ago
A line can be described by its steepness.the steepness of the line is referred to as________.​
Nata [24]

Answer:

slope i think

Step-by-step explanation:

7 0
2 years ago
6w^2-11w-35<br><br> I need to factor the problem
antiseptic1488 [7]
6w^2 - 21w + 10w - 35
3w( 2w - 7) + 5 ( 2w - 7)
(3w + 5) ( 2w - 7)

This is the factorised form.
8 0
3 years ago
Read 2 more answers
Other questions:
  • On a 1-mile walking tour of New York City, a group had to take a detour that was 100 yards shorter than half the distance of the
    5·1 answer
  • Write an equation of line in standard form with a slope of 3 through the point (9,-4)
    15·1 answer
  • Does 26/3 equal 182/21
    14·2 answers
  • What if angle 6=50 then find angle 11 what would it be how would you do it
    12·1 answer
  • HEEEELP I AM BEING TIMED!!!!!!!!!!!!!
    9·1 answer
  • How to find the value of this expression
    15·2 answers
  • A system of linear equations in two variables can have _____ solutions. ​
    5·1 answer
  • Plz I need help with this test that I have due today!!!!!
    6·1 answer
  • Saritha will construct a rectangle that has a height of 4 units and an area of up to 48 square units. What inequality represents
    9·1 answer
  • Can some one answer this
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!