Question

Which of the following equations could be used to solve for the tenth term of the following sequence?



15, 13, 11, 9, ... A(10) = 15 + 10(-2)
A(10) = 15 + 9(-2)
A(10) = 15 + 9(2)
A(10) = 15 + 10(2)

Answer 1

it is an AP with common difference -2 and the first term 15..
nth term of an AP a(n)=a+(n-1)d = 15 + (10-1)(-2) = 15 + 9(-2)

Answer 2

and.. whenever you like an answer, you click 'best response' :)

Answer 3

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