Answer:0.231
Step-by-step explanation:
Answer:
Li Jing's formula i.e.
is right.
Step-by-step explanation:
Considering the sequence

A geometric sequence has a constant ratio r and is defined by





So, the sequence is geometric.
as



so



Therefore, Li Jing's formula i.e.
is right.
ok so F (0) should be equaled to = 0
Consider, in ΔRPQ,
RP = R (Radius of larger circle)
PQ = r (radius of smaller circle)
We have to find, RQ, by Pythagoras theorem,
RP² = PQ²+RQ²
R² = r²+RQ²
RQ² = R²-r²
RQ = √(R²-r²
Now, as RQ & QS both are tangents of the smaller circle, their lengths must be equal. so, RS = 2 × RQ
RS = 2√(R²-r²)