Question

How is the sum expressed in sigma notation for the series: 11 + 17 + 23 + 29 + 35 + 41? a) ∑ (6n + 5), n=1 to 6 b) ∑ (6n + 11), n=1 to 6 c) ∑ (5n + 6), n=1 to 6 d) ∑ (5n + 11), n=1 to 6

Answer 1

Answer: A


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So the right answer is A.

Hope this helps!

Answer 2

HI,

Answer A

`11+17+23+29+35+41\\=(5+6)+(5+2*6)+(5+3*6)+(5+4*6)+(5+5*6)+(5+6*6)\\\displaystyle\ =\sum_(i=1)^6\ (5+6*i)`

Explanation: