Eva M.

asked • 01/28/20

How do I solve this sequence problem?

Given the first term and the common difference of an arithmetric sequence to find the explicit formula and the three terms in the sequence after the last one given

Formula:an=a1+(n-1)*d d=common difference a1=first term an=n+h term


a1=-34, d=-2





1 Expert Answer

By:

Sam Z. answered • 01/29/20

Tutor
4.3 (12)

Math/Science Tutor

Eva M.

where did you get 2?
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01/29/20

Eva M.

what does n equal?
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01/29/20

Sam Z.

tutor
given: d=-2. Negative^2=positive. I got rid of the ( ). As for n; there's not enough imfo. I'll try 1 more thing: n+h=-32-2n 32+h=-3n That's the best I can do.
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01/29/20

Eva M.

You must have got confused, an=n+h term, but this doesn't go in the equation, it just represents it... I figured it out now though... (an) equals nothing, but in the problem, it says find the three terms, so you would suppose to do a2,a3,a4, not a1 because a1=-34 and then you would put it in the formula and n would equal those numbers and solve each equation with once a2 in one equation and then do another equation which n=3... thanks for your help though
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01/29/20

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