Whakaoti mō a_n
a_{n}=7\left(n+2\right)
Whakaoti mō n
n=\frac{a_{n}-14}{7}
Tohaina
Kua tāruatia ki te papatopenga
a_{n}=7+7n+7
Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te n+1.
a_{n}=14+7n
Tāpirihia te 7 ki te 7, ka 14.
a_{n}=7+7n+7
Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te n+1.
a_{n}=14+7n
Tāpirihia te 7 ki te 7, ka 14.
14+7n=a_{n}
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
7n=a_{n}-14
Tangohia te 14 mai i ngā taha e rua.
\frac{7n}{7}=\frac{a_{n}-14}{7}
Whakawehea ngā taha e rua ki te 7.
n=\frac{a_{n}-14}{7}
Mā te whakawehe ki te 7 ka wetekia te whakareanga ki te 7.
n=\frac{a_{n}}{7}-2
Whakawehe a_{n}-14 ki te 7.
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