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# Arithmetic Sequences $t_n=a+(n-1)d$

- 1Given the sequence: $$3, 5, 7...$$ Find the 18th term.
- 2Given the sequence: $$2, 7, 12...$$ Find the 12th term.
- 3Given the sequence: $$5, -1, -7...$$ Find the 10th term.
- 4Find the number of terms in the sequence:

$$4, 6, 8... 54$$ - 5Find the number of terms in the sequence:

$$5, 8, 11...77$$ - 6Find the number of terms in the sequence:

$$-9, -14, -19...-139$$ - 7Find a, d, $t_n$ for the following arithmetic sequence. Then find $t_{15}$.

$$t_3=11\quad ,\quad t_{10}=39$$ - 8Find a, d, $t_n$ for the following arithmetic sequence. Then find $t_{12}$.

$$t_2=-2\quad ,\quad t_{11}=25$$ - 9Find a, d, $t_n$ for the following arithmetic sequence. Then find $t_{8}$.

$$t_4={-14}\quad ,\quad t_{12}=-54$$ - 10Find $t_{13}$ of an arithmetic sequence given:

$$t_5=11 \quad, \quad t_{17}=59$$ - 11How many multiples of 5 are there from 35 to 140 inclusive?
- 12How many multiples of 4 are there from 24 to 124 inclusive?
- 13Find x so that the following are three terms of an arithmetic sequence.

$$2x ,\quad x+3 ,\quad 3x-6$$ - 14Find x so that the following are three terms of an arithmetic sequence.

$$x-3,\quad 2x+7, \quad 5x-3$$

Good test question!

$$e=mc^2$$