Roboguru

Diberikan vektor-vektor  dan . Hitunglah: d.

Pertanyaan

Diberikan vektor-vektor begin mathsize 14px style straight a with rightwards harpoon with barb upwards on top equals 3 straight i with rightwards harpoon with barb upwards on top minus straight j with rightwards harpoon with barb upwards on top end style dan begin mathsize 14px style straight b with rightwards harpoon with barb upwards on top equals negative 8 straight i with rightwards harpoon with barb upwards on top plus 5 straight j with rightwards harpoon with barb upwards on top end style. Hitunglah:

d. begin mathsize 14px style 1 half straight a with rightwards harpoon with barb upwards on top minus 3 over 2 straight b with rightwards harpoon with barb upwards on top end style

Pembahasan Soal:

Perhatikan perhitungan berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 1 half straight a with rightwards harpoon with barb upwards on top plus 3 over 2 straight b with rightwards harpoon with barb upwards on top end cell equals cell 1 half left parenthesis 3 straight i with rightwards harpoon with barb upwards on top minus straight j with rightwards harpoon with barb upwards on top right parenthesis plus 3 over 2 left parenthesis negative 8 straight i with rightwards harpoon with barb upwards on top plus 5 straight j with rightwards harpoon with barb upwards on top right parenthesis end cell row blank equals cell 3 over 2 straight i with rightwards harpoon with barb upwards on top minus 1 half straight j with rightwards harpoon with barb upwards on top minus 24 over 2 straight i with rightwards harpoon with barb upwards on top plus 15 over 2 straight j with rightwards harpoon with barb upwards on top end cell row blank equals cell fraction numerator 3 minus 24 over denominator 2 end fraction straight i with rightwards harpoon with barb upwards on top plus fraction numerator negative 1 plus 15 over denominator 2 end fraction straight j with rightwards harpoon with barb upwards on top end cell row blank equals cell fraction numerator negative 21 over denominator 2 end fraction straight i with rightwards harpoon with barb upwards on top plus 14 over 2 straight j with rightwards harpoon with barb upwards on top end cell row blank equals cell fraction numerator negative 21 over denominator 2 end fraction straight i with rightwards harpoon with barb upwards on top plus 7 straight j with rightwards harpoon with barb upwards on top end cell row blank equals cell negative 21 over 2 straight i with rightwards harpoon with barb upwards on top plus 7 straight j with rightwards harpoon with barb upwards on top end cell end table end style

Jadi, bentuk begin mathsize 14px style 1 half straight a with rightwards harpoon with barb upwards on top minus 3 over 2 straight b with rightwards harpoon with barb upwards on top end style adalah begin mathsize 14px style negative table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 21 over 2 end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell straight i with rightwards harpoon with barb upwards on top end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 7 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell straight j with rightwards harpoon with barb upwards on top end cell end table end style.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 01 April 2021

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