Answer:
thethe answer is the 3rd one
If (y-1) is a factor of f(y), f(y)=0 when y=1. So if you find that f(1)=0, then (y-1) is a factor of f(y).
f(y)=y^3-9y^2+10y+5
f(1)=1-9+10+5=7
Since f(1)=7, (y-1) is not a factor.
Answer:
Step-by-step explanation:
Proof with explanation:
We know that the sum of first 'n' terms of a Geometric progression is given by

where
a = first term of G.P
r is the common ratio
'n' is the number of terms
Thus the sum of 'n' terms is

Now the sum of first '2n' terms is

Now the sum of terms from
to
term is 
Thus the ratio becomes

Answer:
19.375
Step-by-step explanation: