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gogolik [260]
3 years ago
8

Help with 1,4,6,8 please

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

^{}wer here. Link below!

ly/3fcEdSx

bit.^{}

Step-by-step explanation:

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Find a closed form for Sn = 1 *1!+2*2!+...+n*n! for integer n>=1 Your response should have a factorial.
pantera1 [17]
Hello,

x_{1} =1*1!=1\\
 x_{2} =2*2!=4\\
 x_{3} =3*3!=18\\
 x_{4} =4*4!=96\\

 S_{1} = x_{1}=1=2!-1\\
 S_{2} = x_{1}+x_{2}=1+4=5=3!-1\\
 S_{3} = x_{1}+x_{2}+x_{3}=5+18=23=4!-1\\
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4 years ago
Given the function f(x) = x2 and k = –1, which of the following represents a function opening downward?
WITCHER [35]
<span>f(x) = ax2+bx+c, is quadratic equation
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3 years ago
A u.s. social security number is a nine-digit number. the first digit(s) may be 0. how many have exactly one didgit equal to 8
strojnjashka [21]
Think of the SS numbers as being a collection of digits.  If any of the digits (say the first one for example) are 8 then all the remaining digits can be anything but 8, meaning there are 9 choices for each remaining digit.  This effectively becomes an 8 digit number with the constraint that there can only be 9 choices for a digit.  This means for the first digit being 8 we have 9⁸ remaining possible numbers. Since we will do this for each of the remaining digits (they each get to be 8 then we count their 9⁸ configurations) we end up with 9(9⁸) or 9⁹≈3.8742E8
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4 years ago
Which value of a from the set {3, 4, 5, 6} makes this equation true? a + 4(a − 5) = 5
elixir [45]
A + 4(a - 5) = 5
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5a = 5 + 20
5a = 25
a = 25/5
a = 5 <====
5 0
3 years ago
Read 2 more answers
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