1937 and 7617.
The first four terms seem to suggest a power sequence such as Un = (-1/2)*(-4)n but the last term does not fit.
One possibility which does fit all five data points is:
Un = (791n4 - 8898n3 + 34213n2 - 52458n + 26400)/24 for n = 1 , 2, 3, ...
This rule gives the above answers.
They are 1/2 the previous term and so the next term will be -32
128-256
Not sure what a gemetric sequence might be. 2 8 32 128 is the start of the geometric sequence defined by Un = 22n-1 for n = 1, 2, 3, ...
18, 24.5 and 32.
32
They are 1/2 the previous term and so the next term will be -32
256
512 / 2 = 256 256 / 2 = 128 128 / 2 = 64 64 / 2 = 32 32 / 2 = 16 16 / 2 = 8 8 / 2 = 4 4 / 2 = 2 2 / 2 = 1
128-256
128. 1+1=2 2+2=4 4+4= 16 16+16= 32 32+32= 64 64+64 = 128 128+128 = 256 256+256 =512 512+512= 1024 Each time take the answer from the previous problem and double it to find the next number in the sequence.
GCF of numbers 96 128 and 160 is 32.
it continues: 8, 4, 2, 1, 1/2, 1/4, 1/8, 1/16, ...
The next two numbers in the sequence are... 45 & 54.
Not sure what a gemetric sequence might be. 2 8 32 128 is the start of the geometric sequence defined by Un = 22n-1 for n = 1, 2, 3, ...
-4 +8 -16 +32 -64 +128 Next number in this sequence is 184
18, 24.5 and 32.
32