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OpenStudy (anonymous):
Find the 10th term of an arithmetic sequence if t1 = 2.1 and t4 = 1.83.
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OpenStudy (amistre64):
2.1 + 3n = 1.83; solve for n
OpenStudy (amistre64):
gonna nail it down soon lol
OpenStudy (amistre64):
lets start over....
OpenStudy (amistre64):
2.1 +x +x +x = 1.83 3x = -.27 x = -.27/3 = -.09; check t1 = 2.1 t2 = 2.1 -.09 = 2.01 t3 = 2.01 - .09 = 1.92 t4 = 1.92 - .09 = 1.83 checks out
OpenStudy (amistre64):
t1 = t0 - .09 = 2.1 t0 = 2.1 + .09 = 2.19 tn = 2.19 - .09n; chk t4 = 2.19 -.09(4) = 1.83 ..good t10 = 2.19 - .09(10) = 1.29
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