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How do you tell whether the sequence #1, 1 1/6, 1 1/3, 1 1/2# is arithmetic and if it is, what is the common difference?

1 Answer

sankarankalyanam

Jun 19, 2018

#color(blue)("Hence it's an Arithmetic Sequence with c.d. = " d = 1/6#

Explanation:

#a = 1, a_2 = 1(1/6), a_3 = 1(1/3), a_4 = 1(1/2), . . . #

#"Common Difference " d = a_2 - a = 1(1/6) - 1 = (1/6)#

#d = a_3 - a_2 = 1(1/3) - 1(1/6) = 1/6#

#d = a_4 - a_3 = 1(1/2) - 1(1/3) = 1/6#

#color(blue)("Hence it's an Arithmetic Sequence with c.d. = " d = 1/6#

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