find the common ratio and the 100th term of a geometric sequence whose 95th term is 4x and 96th term is -8x3

Question

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Answer 1

4x(r) = -8x^3

divide by 4x

r = -2x^2 = common ratio

a95 = 4x

a96 = -8x^3

a97 = 16x^5

a98 = -32x^7

a99 = 64x^9

a100 = -128x^11

a evens are negative, odds positive