Question: Let b 1 = 4 , b 2 = 2 , b 3 = 7 , and b 4 = - 5 . Calculate the

Let b1=4,b2=2,b3=7, and b4=-5. Calculate the following sums.
(Use symbolic notation and fractions where needed.)
(a)i=24bi=
(b)j=12(bj+2bj)=
(c)k=13kbk=
Let b 1 = 4 , b 2 = 2 , b 3 = 7 , and b 4 = - 5 .

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