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Sagot :
Add -15 and 9, then divide by 2.
The result is -6/2 = -3
-15, ____, -3, _____, 9
Add -15 and -3, then divide by 2
The result is -18/2 = -9
The common difference:
-9 - (-15) = -9 + 15 = 6
So, add 6 to -15, =-9
add 6 to -9 = -3
add 6 to -3 = 3
These are the three missing terms between -15 and 9.
-15, -9, -3, 3, 9
The first of the arithmetic means is -9.
The result is -6/2 = -3
-15, ____, -3, _____, 9
Add -15 and -3, then divide by 2
The result is -18/2 = -9
The common difference:
-9 - (-15) = -9 + 15 = 6
So, add 6 to -15, =-9
add 6 to -9 = -3
add 6 to -3 = 3
These are the three missing terms between -15 and 9.
-15, -9, -3, 3, 9
The first of the arithmetic means is -9.
Hmmmm.
-15 _ _ _ 9
There are 5 numbers
First you will find the d or the common difference
The formula is
An=A1 + (n-1)d
A5= -15 + (5-1)d
9 = -15 + 4d
9+15 =4d
24=4d
Divided both by 4
6 = d
Then add it
A1 =-15
A2=-15+6 =-9
A3=-9 + 6=-3
A4=-3 + 6 = 3
A5= 3 + 6 = 9
Then the sequence is -15, -9, -3, 3, 9
I hope it helps...
-15 _ _ _ 9
There are 5 numbers
First you will find the d or the common difference
The formula is
An=A1 + (n-1)d
A5= -15 + (5-1)d
9 = -15 + 4d
9+15 =4d
24=4d
Divided both by 4
6 = d
Then add it
A1 =-15
A2=-15+6 =-9
A3=-9 + 6=-3
A4=-3 + 6 = 3
A5= 3 + 6 = 9
Then the sequence is -15, -9, -3, 3, 9
I hope it helps...
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