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Tentukan daerah hasil fungsi  pada .

Tentukan daerah hasil fungsi begin mathsize 14px style f open parentheses x close parentheses equals 2 x minus 7 end style pada begin mathsize 14px style negative 2 less or equal than x less or equal than 1 end style.

Jawaban:

 begin mathsize 14px style f open parentheses x close parentheses equals 2 x minus 7 end style pada begin mathsize 14px style negative 2 less or equal than x less or equal than 1 end style, misalkan begin mathsize 14px style y equals f open parentheses x close parentheses end style maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell negative 2 end cell less or equal than cell x less or equal than 1 end cell row cell negative 2 times 2 end cell less or equal than cell 2 times x less or equal than 1 times 2 end cell row cell negative 4 end cell less or equal than cell 2 x less or equal than 2 end cell row cell negative 4 minus 7 end cell less or equal than cell 2 x minus 7 less or equal than 2 minus 7 end cell row cell negative 11 end cell less or equal than cell f open parentheses x close parentheses less or equal than negative 5 end cell row cell negative 11 end cell less or equal than cell y less or equal than negative 5 end cell end table end style 

Jadi, daerah hasil fungsi begin mathsize 14px style f open parentheses x close parentheses equals 2 x minus 7 end style adalah begin mathsize 14px style R subscript f equals open curly brackets y vertical line minus 11 less or equal than y less or equal than negative 5 comma space y element of straight R close curly brackets end style

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