Roboguru

Diketahui vektor . Tentukan: a.

Pertanyaan

Diketahui vektor begin mathsize 14px style a with rightwards arrow on top equals open parentheses 0 comma negative 1 comma 3 close parentheses space dan space b with rightwards arrow on top equals open parentheses negative 2 comma 0 comma 1 close parentheses end style. Tentukan:

a.  begin mathsize 14px style open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar end style 

Pembahasan Soal:

begin mathsize 14px style a with rightwards arrow on top plus b with rightwards arrow on top end style didapatkan:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell a with rightwards arrow on top plus b with rightwards arrow on top end cell equals cell open parentheses table row 0 row cell negative 1 end cell row 3 end table close parentheses plus open parentheses table row cell negative 2 end cell row 0 row 1 end table close parentheses end cell row cell a with rightwards arrow on top plus b with rightwards arrow on top end cell equals cell open parentheses table row cell negative 2 end cell row cell negative 1 end cell row 4 end table close parentheses end cell end table end style 

begin mathsize 14px style open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar end style didapatkan:

begin mathsize 14px style open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar equals square root of open parentheses negative 2 close parentheses squared plus open parentheses negative 1 close parentheses squared plus 4 squared end root open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar equals square root of 4 plus 1 plus 16 end root open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar equals square root of 21 end style 

jadi, hasil dari open vertical bar a with rightwards arrow on top plus b with rightwards arrow on top close vertical bar space adalah space square root of 21 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 06 Mei 2021

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