Question

of a +2 b varies as a -2bprove that a varies as b​

Answer 1

Answer:

mujhe nahi aata bhai soory

Answer 2

Step-by-step explanation:

when a+2b directly proportional to a-2b then

a+2b = k(a-2b)

k is any constant

a+2b k

_____ = ___

a-2b 1

apply componendo dividendo method

a+2b+a-2b k+1

_________ = ___ = k1

a+2b-a+2b k-1

where k1 is any constant

2a/4b = k1

a /b =2k1

a/b = constant

shows that a and b are directly proportional

so a varies as b