Answer:
5x + 2x + 7x
Step-by-step explanation:
Answer:
the left side 1 does not equal to the right side 3 which means that the given statement is false.
Step-by-step explanation:
Answer:
Step-by-step explanation: Go on answer.com if no one knows it on here. Hope this helps!!
Sn=sum of the n terms of the geometric sequence.
a= the first term
r=the common ratio
n=numbers of terms.
Sn=a[(1-r^n)/(1-r)]
In this case:
a=-3
r=a₂/a₁=15/-3=-5
n=9
S₉=-3[(1-(-5)⁹) / (1-(-5))=
S₉=-3(1+1953125)/6)=
S₉=-3(1953126/6)=
S₉=-3(325521)
S₉=-976563
Answer: A. -976563
