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algol13
2 years ago
12

3. If x +4, 2x+5, and 4x +3 represent the first three terms of an arithmetic sequence, then find the

Mathematics
1 answer:
solong [7]2 years ago
8 0

first term = initial number

second term = initial number + common difference

third term = initial number + 2(common difference)

So...

2x+5-(x+4) = common difference

4x+3-(2x+5) = also common difference

2x+5-(x+4) = x+1

4x+3-(2x+5) = 2x-2

Because x+1=2x-2 we can solve for x.

x=3

So the sequence goes... 7,11,15...

19 is the fourth term

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