savorya28p2xs4t savorya28p2xs4t
  • 14-12-2018
  • Mathematics
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what is the 52nd term for the following sequence ? 14,6,-2,-10,-18

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gmany
gmany gmany
  • 19-12-2018

It's an arithmetic sequence:

[tex]a_1=14\\a_2=14-8=6\\a_3=6-8=-2\\a_4=-2-8=-10\\a_5=-10-8=-18\\\vdots\\\text{The general formula for nth term of an arithmetic sequence}\\\\a_n=a_1+(n-1)d\\\\\text{We have}\ a_1=14,\ d=-8.\\\\\text{Substitute:}\\\\a_n=14+(n-1)(-8)=14-8n+8=22-8n\\\\\text{We need}\ a_{52}.\ \text{Put n = 52 to the formula}:\\\\a_{52}=22-8(52)=22-416=-394[/tex]

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