Or Question 5 i:
1 answer:
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The first four terms of sequence is 20, -10, -40, -70
<em><u>Solution:</u></em>
Given that we have to find the first four terms of sequence
<em><u>Given recursive formula is:</u></em>
<em><u>To find the first term, substitute n = 1</u></em>
Thus the first term of sequence is 20
<em><u>To find the second term, substitute n = 2</u></em>
Thus the second term of sequence is -10
<em><u>To find the third term, substitute n = 3</u></em>
Thus the third term of sequence is -40
<em><u>To find the fourth term, substitute n = 4</u></em>
Thus the first four terms of sequence is 20, -10, -40, -70
Very nice handwriting but the math and English are confusing.
Let's assume we're told
The subscript is important.
I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.
If 11 is the mean, the sum of the points is 9(11)=99.
Answer: 1080