Toni B.

asked • 12/28/17

what would the tenth house number be

if the first house number is 2, the next house is 5, the third house is 11, and the fourth house is 23 what would the number to the 10 house be

1 Expert Answer

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Inactive Tutor answered • 12/28/17

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5 - 2 = 3
11 - 5 = 6
23 - 11 = 12
So
47 - 23 = 24
95 - 47 = 48
 
Can you complete the next five and answer?
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Inactive Tutor

To me, this is easier to understand:
    a1 = 2
    an = 2an-1 + 1
So,
     a1 = 2
     a2 = 2*2 + 1  =  5
     a3 = 2*5 + 1  = 11
     a4 = 2*11 + 1  =  23
      . . .
     a10 = ???
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12/28/17

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