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puteri [66]
3 years ago
7

ex-formula">
Mathematics
1 answer:
Vilka [71]3 years ago
3 0

Answer:

±5i

Step-by-step explanation:

sqrt(-25)

We know that sqrt(ab) = sqrt(a) sqrt(b)

sqrt(-1) sqrt(25)

±i 5

±5i

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Part 1. Please show work. Please assist me with these math problems. ​
Vitek1552 [10]

Answer: 1) 2, 3, 4, 9, 32, 279, 8896, 2481705, 22077238784

              2) 2,490,924

              3) Neither

<u>Step-by-step explanation:</u>

S_n=S_{n-2}\cdot (S_{n-1}-1)\quad \\\\S_1=2\quad given\\S_2=3\quad given\\S_3=S_1(S_2-1)\quad =2(3-1)\quad =4\\S_4=S_2(S_3-1)\quad =3(4-1)\quad =9\\S_5=S_3(S_4-1)\quad =4(9-1)\quad =32\\S_6=S_4(S_5-1)\quad =9(32-1)\quad =279\\S_7=S_5(S_6-1)\quad =32(279-1)\quad =8,896\\S_8=S_6(S_7-1)\quad =279(8896-1)\quad =2,481,705\\S_9=S_7(S_8-1)\quad =8896(2481705-1)\quad =22,077,238,784

\sum^8_{k=1}S_k\\\\=S_1+S_2+S_3+S_4+S_5+S_6+S_7+S_8\\\\= 2,490,924\\

Neither

Not arithmetic because the difference between each of the terms is not the same.            

                        S₂ - S₁          S₃ - S₂           S₄ - S₃      

                      3 - 2 = 1       4 - 3 = 1          9 - 4 = 5

Not geometric because the ratios between each of the terms is not the same.                

                       \dfrac{S_2}{S_1}=\dfrac{S_3}{S_2}\qquad \rightarrow \dfrac{3}{2}=\dfrac{4}{3}\qquad \rightarrow \text{cross multiply to get}: 9\neq 8

8 0
3 years ago
Whats 10{3[25-6(22-19)+11]}
katrin2010 [14]
The answer for this equation is 540!
5 0
3 years ago
Express 50p as a fraction of £8<br> Give your answer in its simplest form.
Sonbull [250]

Answer:

1/16

Step-by-step explanation:

Convert 50p to pound sterling.

50p = £0.5

Divide £0.5 with £8.

0.5/8

Simplify the fraction.

0.5×2/8×2

1/16

5 0
3 years ago
Read 2 more answers
What is 154 ÷ 10? A. 0.154 B. 1.54 C.15.4 D.154
Bezzdna [24]

Answer:

15.4

Step-by-step explanation:

154 / 10 = 15.4

If you're ever dividing any number and it isn't a multiple of 10 you just move the decimal over to the left once.

5 0
3 years ago
Read 2 more answers
What is 7 divided by 18
Aleks04 [339]

7 ÷ 18 is 0.38888888888

:)

6 0
3 years ago
Read 2 more answers
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