Advertisements
Advertisements
Question
Given log x = 2m - n , log y = n - 2m and log z = 3m - 2n , find in terms of m and n, the value of log `(x^2y^3 ) /(z^4) `.
Advertisements
Solution
Given log x = 2m - n, log y = n - 2m, log z = 3m - 2n.
Given : log `(x^2y^3)/(z^4)`
We know that log(a/b) = log a - log b.
⇒ log `(x^2y^3)` - log `(z^4)`
We know that log(ab) = log a + log b
⇒ log `(x^2)` + log `(y^3)` - log `(z^4)`
⇒ 2 log x + 3 log y - 4 log z
⇒ 2(2m - n) + 3(n - 2m) - 4(3m - 2n)
⇒ 4m - 2n + 3n - 6m - 12m + 8n
⇒ -14m + 9n
APPEARS IN
RELATED QUESTIONS
Given 2 log10 x + 1 = log10 250, find :
(i) x
(ii) log10 2x
Given: log3 m = x and log3 n = y.
If 2 log3 A = 5x - 3y; find A in terms of m and n.
Simplify : log (a)3 ÷ log a
Express the following in terms of log 2 and log 3: log 36
Express the following in terms of log 2 and log 3: `"log" root(4)(648)`
Write the logarithmic equation for:
V = `(4)/(3)pi"r"^3`
Simplify the following:
`2 "log" 5 +"log" 8 - (1)/(2) "log" 4`
Simplify the following:
`12"log" (3)/(2) + 7 "log" (125)/(27) - 5 "log" (25)/(36) - 7 "log" 25 + "log" (16)/(3)`
If log x = p + q and log y = p - q, find the value of log `(10x)/y^2` in terms of p and q.
If log 2 = x and log 3 = y, find the value of each of the following on terms of x and y: log60
