Find the three arithmetic means between -2 and 10.
Answer

2, 4, 7

1, 5, 7

1, 4, 7

2, 5, 8

Question

Find the three arithmetic means between -2 and 10.
Answer
		
2, 4, 7
		
1, 5, 7
		
1, 4, 7
		
2, 5, 8

amistre64 · Answer

divide the range into 4 equal parts ... the rest is addition

amistre64 · Answer

arithmetic, not geometric ... a common difference

anonymous · Answer

how do i set that up?

amistre64 · Answer

|dw:1402351939888:dw|

amistre64 · Answer

-2 + 4d = 10,  what is d?

anonymous · Answer

so 3?

amistre64 · Answer

yep,  so we simply add 3 to each term

amistre64 · Answer

-2+3
-2+3+3
10-3 ... or -2+3+3+3

should be the 3 terms wanted.

anonymous · Answer

so the answer would be 1,4,7 correct?

amistre64 · Answer

correct :)

anonymous · Answer

thank you so much@!!!:D

anonymous · Answer

Find S22 for -6 + (-4) + (-2) + 0 …
how do i attack this?

amistre64 · Answer

theres a formula we could develop, but its usually just simpler to apply the concept instead of memorizing the formula

good luck :)

amistre64 · Answer

S22 is the sum of the first 22 terms of a sequence that generates the values

amistre64 · Answer

looks arithmatic to me:

a0 = -6+2(0)
a1 = -6+2(1)
a2 = -6+2(2)
...
an = -6+2n