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
Bad White [126]
3 years ago
7

Find a closed form for

Mathematics
1 answer:
Elanso [62]3 years ago
5 0
S_n=1\cdot1!+2\cdot2!+\cdots+n\cdot n!
S_n=(1+1-1)\cdot1!+(2+1-1)\cdot2!+\cdots+(n+1-1)\cdot n!
S_n=(2\cdot1!-1\cdot1!)+(3\cdot2!-1\cdot2!)+\cdots+\bigg((n+1)n!-\cdot n!\bigg)
S_n=(2!-1!)+(3!-2!)+\cdots+\bigg((n+1)!-1\cdot n!\bigg)
S_n=-1!+(n+1)!
S_n=(n+1)!-1
You might be interested in
What is a lifetime cap?
Nostrana [21]
A lifetime cap is the maximum interest rate a borrower could ever pay during the life of a loan.
5 0
3 years ago
HELP ASAP PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
Ratling [72]
81.7%

This is because the area of the inside circle is roughly 18.3% of the big circle. You can get this by finding both of their areas and then dividing the inside circle by the outside one. 
8 0
3 years ago
Which statement is true concerning the vertex and axis of symmetry of h(x)=−2x2+8x?
frozen [14]

Answer:

the vertex is at (2, 8) and the axis of symmetry is x = 2

Step-by-step explanation:

In h(x)=−2x2+8x please use the symbol " ^ " to indicate exponentiation:

h(x)=−2x^2+8x      

This is a quadratic equation with coefficients a = -2, b = 8 and c = 0.

The axis of symmetry equation is x = -b/ (2a).

                                                                                                -8

Here, with a = -2 and b = 8, the axis of symmetry is   x = --------- = 2

                                                                                               2(-2)

To find the y-coordinate of the vertex, substitute 2 for x in h(x)=−2x^2+8x, obtaining

h(2) = -2(2)^2 + 8(2) = -2(4) + 16 = 8

In summary, the vertex is at (2, 8) and the axis of symmetry is x = 2.

5 0
3 years ago
Read 2 more answers
The Spanish club is selling plates of food as a fundraiser. A plate with 2 tacos, 2 cheese enchiladas, and 1 tamale costs $8.50.
frutty [35]

Answer:

Step-by-step explanation:

Put the numbers that represents tacos, enchiladas and tamales in front of x, y and z

For instance,

2x+2y+1z=8.50

3x+2y+2z=13

1x+3y+2z=11.50

5 0
3 years ago
Please answer the question.
LiRa [457]

Answer:

hope you like my answer 4.24264

6 0
3 years ago
Other questions:
  • Need answers for 13, 12, and 13
    10·1 answer
  • What's the simplest form of 2x + 3 - x + 5?
    7·2 answers
  • Last one and I am done oof I hate being homeschooled
    7·2 answers
  • Complete the conjecture: The product of two odd numbers is _____. A.odd B.prime C.even D.negative
    12·2 answers
  • Write 6 1/4% as a decimal
    13·2 answers
  • How fair is 50% of 140 yards? <br><br> 60yards <br> 50yards<br> 70yards<br> 80yards
    7·2 answers
  • What is this turned into a fraction? 1.600334529
    7·2 answers
  • A baker used 48 cups of almond flour for a recipe . The ratio of cups of almond flour to cups of whole wheat that she used was 3
    8·1 answer
  • The ratio of a circle's radius to its diameter is always 1 to 2. In math class, Russell uses his compass to draw a circle with a
    5·2 answers
  • Conjecture help? I need one!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!