A (1; -4) b (-4; 8) find the sum of vectors a b equal to vector c calculate the absolute value of vector c.
| September 10, 2021 | education
The vector sign “→” is written above the letter.
To find the vector “→” with equal to the sum of the vectors “→” a and “→” b, add their corresponding coordinates.
“→” c = “→” a (1; -4) + “→” b (-4; 8) = “→” c (1 + (-4); -4 + 8) = “→” c ( -3; 4).
The absolute value of the vector “→” с is equal to its length.
| “→” c | = √ [(- 3) ^ 2 + 4 ^ 2] = √ [9 + 16] = √25 = 5 units.
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