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Relations And Functions
U = Set of alll triangles = {x : x is a triangle}
A = Set of all trinalges with at least one angle different
= {x : x is a triangle and x has at least one angle different
∴ A' = U - A
= {x : x is a triangle} - {x : x is a triangle and x at least one angle different }
= {x : x is a triangle and no angle is different }
= {x :x is a triangle and x has all angles equal }
= Set of equilateral triangles.
Hence, A' = Set of all equlateral triangles.
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Fill in the blanks in the following table:
Numbers |
Closed under |
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Addition |
Subtraction |
Multiplication |
Division |
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Rational numbers |
Yes |
Yes |
No |
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Integers |
Yes |
No |
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Whole numbers |
... |
Yes |
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Natural numbers |
No |
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i9 + i19
3(7 + i7) + i(7 + i7)
Express each of the complex number given in the form of a + ib.
(1 - i) - (-1 + i6)
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