Advertisements
Advertisements
Question
Find the compounded ratio of: (a – b) : (a + b), (a + b)2 : (a2 + b2) and (a4 – b4) : (a2 – b2)2
Advertisements
Solution
(a – b) : (a + b), (a + b)2 : (a2 + b2) and (a4 – b4) : (a2 – b2)2
Compound ratio
= `"a - b"/"a + b" xx (a + b)^2/(a^2 + b^2) xx (a^4 - b^4)/(a^2 - b^2)^2`
= `"a - b"/"a + b" xx ((a + b)(a + b))/(a^2 + b^2) xx ((a^2 + b^2)(a + b)(a - b))/((a + b)^2 (a - b)^2`
= `(1)/(1)`
or
1 : 1.
APPEARS IN
RELATED QUESTIONS
Two numbers are in the ratio 5:7. If 3 is subtracted from each of them, the ratio between them becomes 2:3. Find the numbers.
Find the duplicate ratio of the following :
(a+b): (a2- b2)
If `"a"/"b" = "c"/"d"`, show that: `(a^3c + ac^3)/(b^3d + bd^3) = ("a" + "c")^4/("b" + "d")^4`
If x : y − 5 : 4 and 2 : x = 3 : 8, find the value of y.
Find the value of x of the following such that the given numbers are in proportion.
45, 135, 90 and x
The ratio of the length and the width of a rectangular sheet of paper is 8 : 5. If the width of the sheet is 17.5 cm; find the length.
Express the following ratio in the simplest form:
85 : 561
0.2 : 5 = 2 : 0.5
15 m : 40 m = 35 m : 65 m
Find the ratio of the following:
40 cm to 1.5 m
