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Exercise 1.1 (Solutions)

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y:** Associative property w.r.t. '+'. ---- (iv) $(100+0) = 100$ **Property:** Additive identity w.r.t. '+'. ---- (v) $(1000 \times 1) = 1000$ **Property:** Multiplicative identity w.r.t. '$\times$'. ---- (vi) $4.1 +(-4.1)

Exercise 1.2 (Solutions)

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{2}]^{21}}\\ &= \frac{1}{i^{21}}=\frac{1}{(i^2)^{10}\cdot i} \\ &=\frac{1}{(-1)^{10}\cdot i}=\frac{1}{1 \cdot i}\\ &=\frac{1}{i}=\frac{1}{i}\times \fra... **Solutions** $\quad (7,9)+(3,-5)$ $=(7+3,9-5)=(10,4)$ </panel> <panel> **Question 7 ** Simplify... $=((5)(-3)-(-4)(-2),(5)(-2)+(-4)(-3))$ $=(-15-8,-10+12)=(-23,2)$ </panel> <panel> **Question 10 **