𝙲𝙾𝙼𝙾 𝚂𝙴 𝙾𝙱𝚃𝙸𝙴𝙽𝙴 ᴇʟ 𝙳𝙾𝙼𝙸𝙽𝙸𝙾 𝚈 𝚁𝙰𝙽𝙶𝙾 𝙳𝙴 𝚄𝙽𝙰 𝙵𝚄𝙽𝙲𝙸𝙾𝙽

ᴇʟ ᴅᴏᴍɪɴɪᴏ ᴅᴇ ᴜɴᴀ «ғᴜɴᴄɪᴏɴ» ғ (x) ᴇs ᴇʟ ᴄᴏɴᴊᴜɴᴛᴏ ᴅᴇ ᴛᴏᴅᴏs ʟᴏs ᴠᴀʟᴏʀᴇs ᴘᴀʀᴀ ʟᴏs ᴄᴜᴀʟᴇs ʟᴀ ғᴜɴᴄɪᴏ́ɴ ᴇsᴛᴀ́ ᴅᴇғɪɴɪᴅᴀ ʏ ᴇʟ ʀᴀɴɢᴏ ᴅᴇ ʟᴀ ғᴜɴᴄɪᴏ́ɴ ᴇs ᴇʟ ᴄᴏɴᴊᴜɴᴛᴏ ᴅᴇ ᴛᴏᴅᴏs ʟᴏs ᴠᴀʟᴏʀᴇs ϙᴜᴇ ғᴏʀᴍᴀ ғ

ᴇᴊᴇᴍᴘʟᴏ ᴀ–1. ʙ–3. ᴄ–4. ᴇ–3.

ᴀϙᴜɪ́ ᴇʟ ᴅᴏᴍɪɴɢᴏ ᴇs ᴇʟ ᴄᴏɴᴊᴜɴᴛᴏ {ᴀ,ʙ,ᴄ,ᴅ} ᴅ ɴᴏ ᴇsᴛᴀ́ ᴇɴ ᴇʟ ᴅᴏᴍɪɴɪᴏ ʏᴀ ϙᴜᴇ ʟᴀ ғᴜɴᴄɪᴏɴ ɴᴏ ᴇsᴛᴇ ᴅᴇɴᴛɪғɪᴄᴀᴅᴀ ᴘᴀʀᴀ ᴅ

ᴇʟ ᴇʟ ʀᴀɴɢᴏ ᴅᴇʟ ᴄᴏɴᴊᴜɴᴛᴏ {1,2,4} 2 ɴᴏ ᴇsᴛᴀ́ ᴇɴ ᴇʟ ʀᴀɴɢᴏ ,ʏᴀ ϙᴜᴇ ɴᴏ ʜᴀʏ ʟᴇᴛʀᴀ ᴇɴ ᴇʟ ᴅᴏᴍɪɴɪᴏ ϙᴜᴇ sᴇ ᴇɴʟᴀᴢᴀ ᴄᴏɴ ᴇʟ 2

ᴇʟ ᴅᴏᴍɪɴɪᴏ ᴅᴇ ʟᴀ ғᴜɴᴄɪᴏ́ɴ ғ x = 1/x ᴇs ᴛᴏᴅᴏs ʟᴏs ɴᴜ́ᴍᴇʀᴏs ʀᴇᴀʟᴇs, ᴇxᴄᴇᴘᴛᴏ ᴇʟ ᴄᴇʀᴏ ʏᴀ ϙᴜᴇ ᴇɴ x = 0 ʟᴀ ғᴜɴᴄɪᴏ́ɴ ɴᴏ ᴇsᴛᴀ́ ᴅᴇғɪɴɪᴅᴀ

ᴇʟ ʀᴀɴɢᴏ ᴛᴀᴍʙɪᴇ́ɴ ᴇs ᴇʟ ᴛᴏᴅᴏs ʟᴏs ɴᴜ́ᴍᴇʀᴏs ʀᴇᴀʟᴇs ᴇxᴄᴇᴘᴛᴏ ᴇʟ ᴄᴇʀᴏ