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Determine the value of P if $P = \sum_{k=1}^{13} 3^{k - 5}$
in Mathematics by Diamond (60,574 points) | 43 views

1 Answer

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T1=3^-4 = 1/81

T2=3^-3

T3=3^-2

common ratio= 3,

hence geometric sum= a(r^n -1)/(r-1)

                                  = (1/81)(3^13 -1)/(3-1)

                                 = 9 841.49
by Diamond (42,256 points)

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