Question

Let u = <-8, -9>. Find 7u.

how i'm going to find u am i going to multiply 7 by 8 or help please and show work please

Answer 1

Answer on Question #42417 – Math - Analytic Geometry

Question

Let $u = \{-8, -9\}$. Find 7u.

how i'm going to find u am i going to multiply 7 by 8 or help please and show work please

Solution

For multiplication of a vector by a scalar you need to multiply each component of the vector by this scalar:

$$7 \cdot (-8, -9) = (7 \cdot (-8), 7 \cdot (-9)) = (-56, -63)$$

Answer: $(-56, -63)$

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