Determine the tenth number in each number pattern: a) 12,3,-6.... b) -18,-7,4... is there any other way to get the 10th term rather than just keep going till i reach the 10th number? thankies
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Try $\displaystyle a_{n}=a_{1}+(n-1)d$ $\displaystyle a_{1}$ is the first term. d=common difference. n=the nth term you want Try #1 for the 10th term: $\displaystyle 12+(10-1)(-9)=-69$ Now, try the 2nd one yourself. OK?.
thanx a lot!
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