Uji Minda 1.2d – Buku Teks Matematik Tingkatan 3 Bab 1 (Indeks)


Soalan 1:
Gunakan hukum indeks untuk meringkaskan setiap pernyataan berikut.
(a) (125)2
(b) (310)2
(c) (72)3
(d) ((– 4)3)7
(e) (k8)3
(f) (g2)13
(g) ((–m)4)3
(h) ((–c)7)3


Penyelesaian:
(a)
$$ \begin{aligned} & \left(12^5\right)^2 \\ & =12^{5(2)} \\ & =12^{10} \end{aligned} $$
(b)
$$ \begin{aligned} & \left(3^{10}\right)^2 \\ & =3^{10(2)} \\ & =3^{20} \end{aligned} $$
(c)
$$ \begin{aligned} & \left(7^2\right)^3 \\ & =7^{2(3)} \\ & =7^6 \end{aligned} $$
(d)
$$ \begin{aligned} & \left((-4)^3\right)^7 \\ & =(-4)^{3(7)} \\ & =(-4)^{21} \end{aligned} $$

(e)
$$ \begin{aligned} & \left(k^8\right)^3 \\ & =k^{8(3)} \\ & =k^{24} \end{aligned} $$
(f)
$$ \begin{aligned} & \left(g^2\right)^{13} \\ & =g^{2(13)} \\ & =g^{26} \end{aligned} $$
(g)
$$ \begin{aligned} & \left((-m)^4\right)^3 \\ & =(-m)^{4(3)} \\ & =(-m)^{12} \end{aligned} $$
(h)
$$ \begin{aligned} & \left((-c)^7\right)^3 \\ & =(-c)^{7(3)} \\ & =(-c)^{21} \end{aligned} $$


Soalan 2:
Tentukan sama ada persamaan berikut benar atau palsu.
(a) (24)5 = (22)10
(b) (33)7 = (272)4
(c) (52)5 = (1252)3
(d) – (72)4 = (– 492)3


Penyelesaian:
(a)



(b)



(c)



(d)


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