Mathematics
Solve for x and y:
and .
Logarithms
21 Likes
Answer
Given,
⇒ 2 log x = 3 log y
⇒ 2 log x - 3 log y = 0 …….(i)
Given,
log (xy) = 5
⇒ log x + log y = 5 ……(ii)
Multiplying (ii) by 2 we get,
⇒ 2 log x + 2 log y = 10 ……(iii)
Subtracting (i) from (iii) we get,
⇒ 2 log x + 2 log y - (2 log x - 3 log y) = 10 - 0
⇒ 2 log x - 2 log x + 2 log y + 3 log y = 10
⇒ 5 log y = 10
⇒ log y = 2
⇒ y = 102 = 100.
Substituting value of y in (ii) we get,
⇒ log x + log 100 = 5
⇒ log x + 2 = 5
⇒ log x = 3
⇒ x = 103 = 1000.
Hence, x = 1000 and y = 100.
Answered By
11 Likes