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Find the rule for the sequence where T1=5, T2=8, T3=11 and then find T4, T10 and T100.

Mathematics

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Step-by-step solution

4 steps
  1. Determine the rule for the sequence.

    We are given the input and output values for the second table:
    Input (nn): 1, 2, 3
    Output (TnT_n): 5, 8, 11

    First, find the common difference between consecutive output values:
    8−5=38 - 5 = 3
    11−8=311 - 8 = 3
    The common difference is 3. This indicates a linear rule of the form Tn=an+bT_n = an + b, where aa is the common difference.
    So, a=3a = 3. The rule is Tn=3n+bT_n = 3n + b.

  2. Find the value of bb.

    Substitute one of the input-output pairs into the rule. Using n=1n=1 and T1=5T_1=5:

    5=3(1)+b5 = 3(1) + b 5=3+b5 = 3 + b b=5−3b = 5 - 3 b=2b = 2

    The rule for the sequence is Tn=3n+2T_n = 3n + 2.

  3. Calculate the missing output values using the rule Tn=3n+2T_n = 3n + 2.

    For Input n=4n=4:

    T4=3(4)+2=12+2=14T_4 = 3(4) + 2 = 12 + 2 = 14

    For Input n=10n=10:

    T10=3(10)+2=30+2=32T_{10} = 3(10) + 2 = 30 + 2 = 32

    For Input n=100n=100:

    T100=3(100)+2=300+2=302T_{100} = 3(100) + 2 = 300 + 2 = 302
  4. Complete the table and list the terms.

    The rule is: Tn=3n+2\boxed{T_n = 3n + 2}

    The completed table is:

    Input123410100
    Output58111432302

    The terms are:
    T1=5T_1 = \boxed{5}
    T2=8T_2 = \boxed{8}
    T3=11T_3 = \boxed{11}
    T4=14T_4 = \boxed{14}
    T10=32T_{10} = \boxed{32}
    T100=302T_{100} = \boxed{302}

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