3-heptene indicates that the third carbon atom in the seven-carbon chain has a double bond with the fourth carbon atom.
H3C-CH2-CH=CH-CH2-CH2-CH3
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3 is called the constant term and the 6n is called the linear term.
It's called a triangle.
An algebraic expression that is not equal (Such as 3=0) is called an inequality, and can be expressed as 3≠0.
A cube can be called a cube or a 3 dimensional shape.
it is called geometricly 3-d