Question

Find the 17th term of the arithmetic sequence –5, 1, 7, 13, …

A. 97
B. 107
C. 91
D. 87

Answer 1

c

Explanation:

-5,1,7,13,19,25,31,37,43,49,55,61,67,73,79,85,91

Answer 2

91

Explanation:

the common diference is : d = ( 13)-(7)=(7)-(1)=(1)-(-5)=6

the first term is A1 = -5

the n-ieme term is : An = A1 +(n-1)d

An = -5+6(n-1)

An = 6n-11

the 17th term in the arithmetic sequence is : A17 = 6(17)-11 =91