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CherishGundago
Answered

The 5th term of a geometric sequence is 8 and the 9th term is 16128. Find the first term.

Sagot :

Epicrobodog2000go

Answer:

-64456/3 or -21485.333

Step-by-step explanation:

a9 = a5 + (4-1)d

16128 = 8+3d

16128-8 = 3d

16120 = 3d

d = 16120/3

a5 = 8

a4 = (8 - 16120/3)

a2 = -16112

a1 = (a2- 16120/3) = -64456/3

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