Whakaoti i te a_{n}=4+7(n-1)

$$a _ { n } = 4 + 7 ( n - 1 )$$

Whakaoti mō a_n

$$a_{n}=7n-3$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te n-1.

$$a_{n}=4+7n-7$$

Tangohia te 7 i te 4, ka -3.

$$a_{n}=-3+7n$$

Whakaoti mō n

$$n=\frac{a_{n}+3}{7}$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te n-1.

$$a_{n}=4+7n-7$$

Tangohia te 7 i te 4, ka -3.

$$a_{n}=-3+7n$$

Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.

$$-3+7n=a_{n}$$

Me tāpiri te 3 ki ngā taha e rua.

$$7n=a_{n}+3$$

Whakawehea ngā taha e rua ki te 7.

$$\frac{7n}{7}=\frac{a_{n}+3}{7}$$

Mā te whakawehe ki te 7 ka wetekia te whakareanga ki te 7.

$$n=\frac{a_{n}+3}{7}$$