obeyjazmin obeyjazmin

03-06-2014
Mathematics

contestada

Q:
What is the indicated term of the arithmetic sequence? someone help!!!!
a14 for 200,196,192...
A:
a. 148
b. 252
c. 144
d. 239

Respuesta :

Аноним Аноним

14-06-2014

[tex]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[/tex]

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