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Find A· B
- a=10i+6j,b=5i+3j\mathbf { a } = 10 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = 5 \mathbf { i } + 3 \mathbf { j }

Question 179

Multiple Choice

Find a· b.
- a=10i+6j,b=5i+3j\mathbf { a } = 10 \mathbf { i } + 6 \mathbf { j } , \quad \mathbf { b } = 5 \mathbf { i } + 3 \mathbf { j }


A) ⟨50,18⟩\langle 50,18 \rangle
B) −32- 32
C) ⟨15,9⟩\langle 15,9 \rangle
D) 68

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