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Stolb23 [73]
3 years ago
14

Please give a real answer.

Mathematics
1 answer:
Ilya [14]3 years ago
7 0

Answer:

3.5 m

Step-by-step explanation:

PQ = 5/(5+5) × 7

= 5/10 × 7

= 3.5 m

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Can someone help me out with this question
Alex_Xolod [135]

Answer:

B

Step-by-step explanation:

positive 3

8 0
3 years ago
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Which explicit formula generates the infinite sequence 2, 9, 28, 65, 126, ...?
Dimas [21]
1. The terms of a sequence are denoted by u_{1} ,  u_{2}, u_{3}, u_{4}, u_{5},...

2.
 u_{1}  = 2  = 2*1

  u_{2} = 9 = 3*3
 
u_{3} = 28 = 4*7

u_{4} = 65 = 5*13

u_{5} = 126 = 6*21


3. so it is clear that the first columns add each time by one, and the second column add by 2, then by 4, by 6, by 8 and so on.

4. consider only the second column and how we get the terms, which we will call t_{1} , t_{2}, t_{3}, t_{4}, t_{5},...:

t_{1}=1

t_{2}=1+2

t_{3}=1+2+4=1+2+2*2

t_{4}=1+2+4+6=1+2+2*2+2*3=1+2(1+2+3)

t_{5}=1+2+2*2+2*3+2*4=1+2(1+2+3+4)

5.
So

u_{n}=(n+1)(1+2{1+2+3+....(n-1)})
        
         =(n+1)(1+2 [(n-1)n/2])

         = (n+1)(1+(n-1)n)
       
         =(n+1)( n^{2}-n+1 )


6. We can check: u_{3} = (3+1)( 3^{2}-3+1 )=4*(9-3+1)=4*7=28

7. Remark: Gauss addition formula: 1+2+3+....+n=n(n+1)/2


6 0
4 years ago
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Pani-rosa [81]

Answer:

9.5 hours

Step-by-step explanation:

8 0
4 years ago
Zz* + 3iz = p + 9i
REY [17]

Step-by-step explanation:

I need to use the fact that it has exactly one root to find the y part - do I use the quadratic formula on the last bit I have written?

I have x already and z = x+iy

8 0
3 years ago
Steven wants to buy a $565 bicycle. Steven has no money saved, but will be able to deposit $30 into a saving account when he rec
galina1969 [7]
30(x) - 65 = 565, X represents the amount of paychecks he has to cash in and the -65 is the money he has to pay back first.
8 0
3 years ago
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