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One - One function

Compute the f...

Question

Compute the following:
(i) $(- 1)^{78}$ (ii) $11^{3}$

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Solution

(i) $(- 1)^{78}$
$= (- 1)^{2 \times 39}$
$= [(- 1)^{2}]^{39}$
$= (1)^{39}$
$= 1$
$∴ (- 1)^{78} = 1$
(ii) $(11)^{3}$
$= 11 \times 11 \times 11$
$= 121 \times 11$
$= 1331$
$∴ C (11)^{3} = 1331$ .

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