6th term of the sequence 1, -5, 25, -225, ... answer a.s.a.p
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6th term of the sequence 1, -5, 25, -225, ... answer a.s.a.p
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Answer:
a_6 = -3, 125
Step-by-step explanation:
Given:
a_1 = 1
a_2 = -5
a_3 = 25
a_4 = -225
find r,
r = a_n/a_n-1
r = a_2/a_1
r = -5/1
r = -5
to solve for a_6,
a_n = a_1r^n-1
a_6 = 1(-5^6-1)
a_6 =-5^5
a_6 = -3, 125