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Va rog ma ajutati la aces exercitiu : enumerati elementele multimilor: A={x|x∈Z, x |-12}                           B={x|x∈Z, -5|x si -32≤x≤42}        C={x| x∈Z, -205|x} D= {x | x∈Z, x este multiplu de -3 si |x|≤45} va rog mult ajutati-ma

Răspuns :

Cpw
daca A={x|x∈Z, x |-12}   atunci :
A={-12,-6,-4,-3,-2,-1,1,2,3,4,6,12}

B={x|x∈Z, -5|x si -32≤x≤42}  =>
B={-30,-25,-20,-15,-10,-5,5,10,15,20,25,30,35,40}

C={x| x∈Z, -205|x}
Conform definitiei, cum ca  a|b daca exista un numar c astfel incat b=a*c
=> C={-205,-410,-605..., 205,410,605,....,k*205}
k∈Z

D= {x | x∈Z, x este multiplu de -3 si |x|≤45}
D={45,42,39,36,33,30,27,24,21,18,15,12,9,6,3,-3,-6,-9,-12,-15,-18,-21,-24,-27,-30,-33,-36,-39,-42,-45}





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