in a gp a6=4096 and a=128 find r?
Answers
Answered by
15
a = 128
a6 = ar^5 = 4096 = 128×r^5 = 4096
r^5 = 4096/128
r^5 = 32
r^5 = 2^5
r = 2
❣️Hope it helps❣️
Answered by
8
Answer:
2
Step-by-step explanation:
a6=4096
let 4096 be aₙ,
then aₙ=a*rⁿ⁻¹
therfore, 4096 = 128*r⁶⁻¹
= 4096/128=r⁵
32=r⁵
2⁵=r⁵
∴r=2
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