A marching band has 14 marchers in the first row, 16 in the second row, 18 in the third row, and
so on, for 15 rows. How many marchers are in the last row?

Question

A marching band has 14 marchers in the first row, 16 in the second row, 18 in the third row, and 
so on, for 15 rows. How many marchers are in the last row?

anonymous · Answer

find the 15th term

anonymous · Answer

even numbers.. keep adding 2, 15 times

anonymous · Answer

row 1, N=14
row 2, N=14+2 = 14 + 2*1
row 3, N=14+2+2 = 14+2*2
row 4, N=14+2+2+2 = 14+2*3
and so on
for 15th row..?

anonymous · Answer

Want the formula?

anonymous · Answer

Stay in school kid , this is a easy and fun problem , i loved these when i had em .

anonymous · Answer

These are so complicating man I need help

anonymous · Answer

do you see a trend the numbers I showed above?

anonymous · Answer

Yea but theres a faster way to do it though

anonymous · Answer

just keep adding 2 to 14 , 15 times , not a lot of work .

anonymous · Answer

14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

anonymous · Answer

42?

anonymous · Answer

Well not 15 times , 14 times . But the answers 42 .

anonymous · Answer

ok

anonymous · Answer

@cashybabiie

anonymous · Answer

yes. thats what I meant,
$$a_n=a_0+(n-1)d\
a_0=14\
n=15\
d=2\
\text{find }a_n
$$