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2 votes
(+4)4.Expand37 + 8 + 9 + 10 +117 + 8 + 9 + 10 +11 + 12 + 133 + 4 + 5 + 6 + 7O7 + 11 + 15 + 19 +23

(+4)4.Expand37 + 8 + 9 + 10 +117 + 8 + 9 + 10 +11 + 12 + 133 + 4 + 5 + 6 + 7O7 + 11 + 15 + 19 +23-example-1
User Colm Troy
by
8.2k points

1 Answer

2 votes

In the summation, we have n equals 3 and upto 7.

To expand the summation, substitute the value of n in the function from 3 to 7,


(3+4)=7
(4+4)=8
(5+4)=9
(6+4)=10
(7+4)=11

Thus the expansion is


7+8+9+10+11

The correct option is a.

User Paul Crowley
by
8.2k points
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