Soalan 4:
Cari nilai bagi setiap yang berikut tanpa menggunakan kalkulator.
Penyelesaian:
(a)
$$ \begin{aligned} (-6)^2 & =(-6) \times(-6) \\ & =36 \end{aligned} $$
(b)
$$ \begin{aligned} \left(\frac{2}{7}\right)^2 & =\left(\frac{2}{7}\right) \times\left(\frac{2}{7}\right) \\ & =\frac{4}{49} \end{aligned} $$
(c)
$$ \begin{aligned} \left(-4 \frac{1}{3}\right)^2 & =\left(-\frac{13}{3}\right) \times\left(-\frac{13}{3}\right) \\ & =\frac{169}{9} \end{aligned} $$
(d)
$$ \begin{aligned} (-8.1)^2 & =(-8.1) \times(-8.1) \\ & =65.61 \end{aligned} $$
(e)
$$ \begin{aligned} \sqrt{361} & =\sqrt{19 \times 19} \\ & =19 \end{aligned} $$
(f)
$$ \begin{aligned} \sqrt{\frac{9}{49}} & =\sqrt{\frac{3}{7} \times \frac{3}{7}} \\ & =\frac{3}{7} \end{aligned} $$
(g)
$$ \begin{aligned} \sqrt{2 \frac{14}{25}} & =\sqrt{\frac{64}{25}} \\ & =\sqrt{\frac{8}{5} \times \frac{8}{5}} \\ & =\frac{8}{5} \end{aligned} $$
(h)
$$ \begin{aligned} \sqrt{1.21} & =\sqrt{\frac{121}{100}} \\ & =\sqrt{\frac{11}{10} \times \frac{11}{10}} \\ & =\frac{11}{10} \\ & =1.1 \end{aligned} $$
Cari nilai bagi setiap yang berikut tanpa menggunakan kalkulator.
Penyelesaian:
(a)
$$ \begin{aligned} (-6)^2 & =(-6) \times(-6) \\ & =36 \end{aligned} $$
(b)
$$ \begin{aligned} \left(\frac{2}{7}\right)^2 & =\left(\frac{2}{7}\right) \times\left(\frac{2}{7}\right) \\ & =\frac{4}{49} \end{aligned} $$
(c)
$$ \begin{aligned} \left(-4 \frac{1}{3}\right)^2 & =\left(-\frac{13}{3}\right) \times\left(-\frac{13}{3}\right) \\ & =\frac{169}{9} \end{aligned} $$
(d)
$$ \begin{aligned} (-8.1)^2 & =(-8.1) \times(-8.1) \\ & =65.61 \end{aligned} $$
(e)
$$ \begin{aligned} \sqrt{361} & =\sqrt{19 \times 19} \\ & =19 \end{aligned} $$
(f)
$$ \begin{aligned} \sqrt{\frac{9}{49}} & =\sqrt{\frac{3}{7} \times \frac{3}{7}} \\ & =\frac{3}{7} \end{aligned} $$
(g)
$$ \begin{aligned} \sqrt{2 \frac{14}{25}} & =\sqrt{\frac{64}{25}} \\ & =\sqrt{\frac{8}{5} \times \frac{8}{5}} \\ & =\frac{8}{5} \end{aligned} $$
(h)
$$ \begin{aligned} \sqrt{1.21} & =\sqrt{\frac{121}{100}} \\ & =\sqrt{\frac{11}{10} \times \frac{11}{10}} \\ & =\frac{11}{10} \\ & =1.1 \end{aligned} $$
Soalan 5:
Hitung nilai bagi setiap yang berikut dengan menggunakan kalkulator. Berikan jawapan anda betul kepada dua tempat perpuluhan bagi (e) hingga (h).
Penyelesaian:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Hitung nilai bagi setiap yang berikut dengan menggunakan kalkulator. Berikan jawapan anda betul kepada dua tempat perpuluhan bagi (e) hingga (h).
Penyelesaian:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)