Answer:
an = 1/2 (n) (n+1)
Step-by-step explanation:
1,3,6,10,.........
3-1=2
6-3=3
Each term is different so there is no common difference. It is not an arithmetic sequence
3/1=3
6/3 =2
Each term is different so there is no common ratio. It is not a geometric sequence
1 3 6 10
+2 +3 +4
a1 = 1
a2 = 3
a3 = 6 = 2*3
a4 = 10 = 2*5
Simplified the answer is -9x^2 + 12xy
Answer:
C 1728
Step-by-step explanation:
since a volume always goes with the cubic (power of 3) units, tripling all dimensions (in all 3 dimensions / coordinate directions) puts this factor of 3 also to the power of 3 = 27
so, the volume increases by the factor of 27.
64×27 = 1728
