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Insert 5 arithmetic means between -1 and 11

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1 vote

Answer:

Explanation:

-1 1 3 5 7 9 11

That's the answer. If you need a method or a formula, that's a little harder.

L = a + (n - 1)*d

a = -1

L = 11

n = 7

or n is the hard part. If you have 5 means, then you have 6 spaces. So n must be 7 in all

11 = -1 + (7 - 1)*d add 1 to both sides. Combine the brackets

11+1 = -1+1+ 6*d

12 = 6d divide by 6

12/6 = d

2 = d

What this tells you is that each term has 2 added to it to get to the next one.

User Mtj
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