Question: an arithmetic sequence where u1= 1.3 u2= 1.4 and uk = 31.2 a) find the value of k b) find the value of Sk consider

an arithmetic sequence where u1= 1.3 u2= 1.4 and uk = 31.2

a) find the value of k

b) find the value of Sk

consider the terms Un such that n is less than or equal to k

let F be the sum of terms for which n is not a multiple of 3

c) show that F=3240

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