The expression 3 x n can be written 3n. Use n= 1,2,3 ..., 10 to evaluate the expression. Describe the set of ten numbers. Suppose the sequence continues ror values of n greater than 10. Do the numbers 12, 21, 30 or 210 appeae in the sequence?

Answer 1

when we type the letter xwe mean the letter
when we type * we mean "times".
so I think
3*n = 3n
3*1 = 3
3*2 = 6
3*3 = 9
3*4 = 12
.
.
3*10 = 30
well
what is 12/3 ?
4 right
so
3*4 = 12 is there all right
same for 21 and 30
what about 210
well 210/3 = 70
so
3*70 = 210 and it is in the sequence for n = 70