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If function f and fog are oneone then how is function g also oneone ?
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Jan 3
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radha gogia
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it is not true
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If f is oneone and g is onto.Then what can we say about gof?
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Jan 4, 2015
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Set Theory & Algebra
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GateMaster Prime
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Function f and g
Let $f(x)$ mean that function $f$ ,applied to $x$,and $f^{n}(x)$ mean $f(f(........f(x)))$,that is $f$ applied to $x$ ,$n$ times.Let $g(x) = x+1$ and $h_{n}(x)=g^{n}(x).$Then what is $h_{9}^{8}(72)?$
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Oct 7, 2018
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Set Theory & Algebra
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Lakshman Patel RJIT
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discretemathematics
settheory&algebra
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If f:X→Y and a, b⊆X, then
If $f:X→Y$ and $a, b \subseteq X$, then $f(a \cap b)$ is equal to $f(a) –f(b)$ $f(a) \cap f(b)$ a proper subset of $f(a)\cap f(b)$ $f(b)–f(a)$
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Sep 29, 2015
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Tendua
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Composite functions gof and fog
Consider the following statements regarding function f and g. 1) if gof is injective, then g is injective but f need not be. 2) if gof is surjective then both f and g are subjective. A) (1) is true,(2) is false B) (1) is false,(2) is true C) Both are true D) Both are false
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Oct 7, 2018
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Set Theory & Algebra
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Lakshman Patel RJIT
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Let f: Z+ –> Q f(x)=x/(2x+1) , x ∈ z+ then ? Practice set
Let f: Z+ –> Q is a mapping from the set of positive integers to the set of complex numbers, defined as f(x)=x/(2x+1), x ∈ z+ then which of the following is true? a) f is a bijective mapping b) f is a injective but not surjective mapping c) f is a not injective but surjective mapping d) f is neither injective nor surjective
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Nov 2, 2017
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Set Theory & Algebra
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techbrk3
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Given two positive functions f(n) and g(n).If f(n)/g(n)=c , for some constant c >=0 , which of the stmts are true ?
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Jan 29, 2016
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radha gogia
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asymptoticnotations
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If f:X→Y and a, b⊆X, then f(a⋂b) is equal to
If f:X→Y and a, b⊆X, then f(a⋂b) is equal to (a) f(a) – f(b) (b) f(a) ⋂ f(b) (c) a proper subset of f(a) ⋂ f(b) (d) f(b) – f(a)
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Jan 14, 2016
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Set Theory & Algebra
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Payal Rastogi
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