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1. Variation Equations
1. Direct Variation eg. If y varies directly as x and x = 4 when y = 2. find y when x=18
2. Inverse Variation eg. If y varies inversely as x and x=3 when y=2. find y when x=15
3. Joint Variation eg. If x varies jointly as yz and x=8 when y=4,z=3. find x when y=6,z=4
4. Consonant Variation eg. If y varies directly as x and x = 4 when y = 2. find constant
5. Proving results of Variation eg. If x `prop` y then prove that `x^3+y^3 prop x^2y-xy^2`





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