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CALCULUS HELP? SIGMA NOTATION QUESTION? (will award best answer!)?
I've attached a picture of the question and I really need examples with numbers because i'm really having trouble understanding how and in what scenario multiplying those individual sums would not be equal to multiplying them mashed together???
1 Answer
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- alexLv 711 months agoFavorite Answer
example
n=2
Left side
(a1+a2)(b1+b2) = a1b1+a2b2 + a1b2+a2b1
Right side
=a1b1+a2b2
or
n=2
a1 = 1 , a2= 2
b1 = 1 , b2 = 3
left side
(1+2)(1+3)=12
Right side
(1)(1)+(2)(3)=7
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