obeyjazmin obeyjazmin

03-06-2014
Mathematics

Answered

Q:

What is the indicated term of the arithmetic sequence? someone help!!!!

a14 for 200,196,192...

A:

A148
B252
C144
D239

Verified Answer :

Anonymous Anonymous

14-06-2014

\(a_1=200;\ a_2=196;\ a_3=192\\\\r=a_2-a_1\to r=126-200=-4\\\\a_n=a_1+(n-1)r\\\\a_n=200+(n-1)\cdot(-4)=200-4n+4=204-4n\\\\a_{14}=204-4\cdot14=204-56=148\\\\Answer:A\)

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