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Number 7 part b and c

© A. FILL IN THE FOLLOWING TABLE: 5 9 10 ] n 1 Soll Tn 2 3 4 34 6. 7 8 6. 10 15 212836 10 20 / 35 A B. DETERMINE FORMULA FOR

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A 2 3 4 5161718 TO 9 66 3 110 115 121/28 136/45 155 10 Tn 20/35/56/84/120/165/220/286 Sn= (22+ (n-1)d a is the ist term. d isCc Mathematical inductions To prove Th= n(n+in+2) step I show that the statement is true for nal, lie T,=an LHS = Ti EI(1+i(1TkH taktl. akti Hence, by the principle of mathematical induction, Th= ncnticnta) is true Tkt 9x+) kt -K(k+1) (k+2) we know t

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