pls help me out...............
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Step-by-step explanation:
a) (x^a/x^b)^a+b . (x^b/x^c)^b+c . (x^c/x^a)^c+a = 1
Taking LHS,
= (x)^{(a-b).(a+b)} . (x)^{(b-c).(b+c)} . (x)^{(c-a).(c+b)}
= (x)^a²-b².(x)^b²-c².(x)^c²-a²
= (x)^a²-b²+b²-c²+c²-a²
= x⁰
= 1 = RHS
Note : There is a printing mistake in the question. Please re-check it, as instead of x^(c-a) it has to be x^(c+a).
b) Let A be 100%,
ATQ,
A = 20% more than B
100 % of A = 20% of B + 100% of B
100 % of A = 120% of B
(100/120) % of A = 1% of B
100*(100/120) % of A =100 % of B
83.33 % of A = 100 % of B
So,B is (100 - 83.33)%= 16.67% less than A
c) 45= x%*54
45= x/100*54
x = (45/54)*100
x = 83.33%
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