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Kobotan [32]
3 years ago
10

Find two vectors v1 and v2 whose sum is 〈−3,4〉〈−3,4〉, where v1 is parallel to 〈3,−3〉〈3,−3〉 while v2 is perpendicular to 〈3,−3〉〈3

,−3〉.
Mathematics
1 answer:
Sati [7]3 years ago
6 0

Answer:

∵ Vector v_1 is parallel to 〈3, -3〉,

⇒ v_1 = x〈3, -3〉 = 〈3x, -3x〉,

Where, x is any scalar,

According to the question,

v_1+v_2 = 〈-3,4〉

⇒ 〈3x, -3x〉+ v_2 = 〈-3,4〉

⇒ v_2 = 〈-3,4〉 - 〈3x,-3x〉

Now, v_2 is perpendicular to 〈3, -3〉,

⇒ v_2.〈3, -3〉 = 0

⇒ ( 〈3,4〉 - 〈3x, -3x〉 ). 〈3, -3〉 = 0

⇒ 〈-3-3x,4+3x〉 . 〈3, -3〉 = 0

⇒ (-3-3x)(3) + (4+3x)(-3) = 0

⇒ - 9 - 9x - 12 - 9x = 0

⇒ -21 - 18x = 0

⇒ x = -\frac{7}{6}

Hence, required vectors are,

v_1 = 〈-7/2, 7/2〉

v_2 =〈3,4〉 - 〈-7/2, 7/2〉 = 〈13/2, 1/2〉

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