What number must be added to each of the numbers 5, 21, and 69 so that the numbers formed are in continued proportion?
(explanation not needed)
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Answer:
Let the number added be x
therefore,
(16+x) : (26+x) = (26+x): (40+x)
=(16+x)x(40+x)= (26+x)×(26+x)
=x2+ 56 x +640 = x2+52x+676
=9
Step-by-step explanation:
solve using this method
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