Whakaoti i te {l}{a_{n}=-3(n-1)/3-2n}{n=5}

$$\left\{ \begin{array} { l } { a _ { n } = - \frac { 3 ( n - 1 ) } { 3 - 2 n } } \\ { n = 5 } \end{array} \right.$$

Whakaoti mō a_n, n

$$a_{n} = \frac{12}{7} = 1\frac{5}{7} \approx 1.714285714$$

$$n=5$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$a_{n}=-\frac{3\left(5-1\right)}{3-2\times 5}$$

Tangohia te 1 i te 5, ka 4.

$$a_{n}=-\frac{3\times 4}{3-2\times 5}$$

Whakareatia te 3 ki te 4, ka 12.

$$a_{n}=-\frac{12}{3-2\times 5}$$

Whakareatia te -2 ki te 5, ka -10.

$$a_{n}=-\frac{12}{3-10}$$

Tangohia te 10 i te 3, ka -7.

$$a_{n}=-\frac{12}{-7}$$

Ka taea te hautanga \frac{12}{-7} te tuhi anō ko -\frac{12}{7} mā te tango i te tohu tōraro.

$$a_{n}=-\left(-\frac{12}{7}\right)$$

Ko te tauaro o -\frac{12}{7} ko \frac{12}{7}.

$$a_{n}=\frac{12}{7}$$

Kua oti te pūnaha te whakatau.

$$a_{n}=\frac{12}{7} n=5$$