-26r + 7r - 15p - 7p
2 answers:
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From given picture we can see that X is mid point of line PQ
So PQ=2PX
From given picture we can see that Y is mid point of line PR
So PR=2PY
Now consider triangles PRQ and PYX
Sides PQ and PX has same ratio as of sides PR and PY (as calculated above)
angle XPY= angle QPR (common angle)
Hence triangles PRQ and PYX are similar.
We know that ratio of the sides of similar triangles is always equal so we can write:
Plug the given values QR=8 and PQ=2PX
Hence final answer is XY = 4 units.
Answer:
You need to sum at least 5000 terms
Step-by-step explanation:
Remember what the estimation theorem for alternating series says.
Given a series
An upper bound for the error of the series is
so
For this case you want
is approximately 5000. So you must sum at least 5000 terms.