Show that K-47 +91-12k und B-21-31 -4k , ure puruld wo unthaa.
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Answer:
It is an AP na
Explanation:
B-a=c-b
(91-12k)+k-47=b-21-31-4k
91-12k+k-47=b-10-4k
54=9k
K=54/9
K=6
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