Which expression defines the given series for seven terms?
9 + 17 + 25 +..

∑(1+8n)

Step-by-step explanation:

Given:

series : 9+17+25+...

As first term= 9

for n=1, expression should comes out to be 9

for 2+7n:

2+7(1)=9

for (n+8)

1+8=9

for (1+8n)

1+8(1)=9

all is true

now for n=2, the expression's outcome be 17

for 2+7n:

2+7(2)=16

comes wrong

for (n+8)

2+8=10

comes wrong

for (1+8n)

1+8(2)=17

come right

Also for n=3, (1+8(3))=25

Hence correct expression is ∑(1+8n) !

i'm sorry mate, but i am not seeing any figures. i am unable to solve this for you.

if the rectangular pool has a area of 192 square ft. and length of 15 ft. you must divide 15 into 192. 192 ÷ 15 = about 13 ft.