Q25
If x varies as y then x2 + y2 varies as
A.
x + y
B.
x - y
C.
x2 - y2
D.
x3 - y3
E.
None of these
AnswerAnswer: Option E
Solution
Answer: Option E
Solution:
Given,x = y
Or, x - y = 0
Or, (x - y)2 = 0
Or, x2 + y2 - 2xy = 0
Or, x2 + y2 = 2xy
It means that, x2 + y2 varies as xy