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BIGJAYWESTSIDE
05.01.2020 •
Mathematics
Twice the diffrence of a number and 9 is equal to three times the sum of the number and 5. find the number
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Ответ:
2n - 18 = 3n + 15
2n - 3n = 15 + 18
-n = 33
n = -33
Ответ:
answer is
Step-by-step explanation:
Object distance (u) = -100cm Focal length (f) = 50cm Image distance = v By lens formula; 1v−1u=1f1v−1u=1f ⇒ 1v−1−100=1501v−1−100=150 ⇒1v=150−11001v=150−1100 ⇒1v=2−1100−11001v=2−1100−1100 v =100cm Hence the image is formed at 100 cm behind the lens. Object distance (u) = -100cm Focal length (f) = -25cm Image distance = v By lens formula;Read more on Sarthaks.com - https://www.sarthaks.com/951256/an-object-is-kept-at-a-distance-of-100-cm-from-each-of-the-above-lenses-calculate-the?show=951265#a951265