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If z1 = 1 – 3i, z2 = – 4i, and z3 = 5, show that (z1 z2)z3 = z1(z2 z3) - Mathematics

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प्रश्न

If z1 = 1 – 3i, z2 = – 4i, and z3 = 5, show that (z1 z2)z3 = z1(z2 z3)

योग

उत्तर

(z1 z2) z3 = [(1 – 3i)(– 4i)]5

= [– 4i + 12i2]5

= [– 12 – 4i]5

= – 60 – 20i  ........(1)

z1(z2 z3) = (1 – 3i)[(– 4i)(5)]

= (– 20i + 60i2)

= – 20i – 60  .......(2)

From (1) and (2) we get

∴ (z1 z2)(z3) = z1(z2 z3)

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Basic Algebraic Properties of Complex Numbers
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Complex Numbers - Exercise 2.3 [पृष्ठ ६०]

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सामाचीर कलवी Mathematics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 2 Complex Numbers
Exercise 2.3 | Q 1. (ii) | पृष्ठ ६०
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