If the pattern is extended, which of these is the likely cost of a 4-bedroom apartment?
$715
$725
$750
$775
Which of the following arithmetic series has a sum of 105?
the first 7 terms of 5+2n-1
the first 7 terms of 7+2n-1
the first 7 terms of 9+2n-1
the first 7 terms of 11+2n-1
The table below shows the partial sums of a series, with n being the numbers of terms and Sn being the partial sums. Is the series arithmetic?
Yes, because the second differences of the partial sums are each 4.
Yes, because the second differences of the partial sums are each 8.
Yes, because the second differences of the partial sums are each 6.
No, because the second differences of the partial sums are not constant.
What is the 10th term in the sequence 400, 200, 100, 50, . . . ?
252
25
254
2532
Define the following sequences as a function and find the next term in the sequence.
19, 27, 35, 43 . . .
fn=fn-1+19;50
f1=19,fn+1=fn+8,n≥2;51
fn+1=fn-8;35
f1=19,fn=19+8n;51