Question

Se dau multimile A={x cu proprietatea 25
25^{10} <5^{x} ≤125^{8} } si B={y cu proprietatea y=3·x-11 si x∈A}
Determinati elementele multimilor A si B
va rog frumos.am nevoie urgent
dau coroana

Answer 1

5²*¹⁰<5 ^x ≤ 5³*⁸
5²⁰ < 5^x≤ 5²⁴
20<x≤24
x∈ {21,22,23,24} ⇒ A= {21,22,23,24}

y=3*21-11= 63-11=52
y=3*22-11=66-11=55
y=3*23-11=69-11=58
y=3*24-11=72-11=61
B= {52,55,58,61}