If the 7th of an ap is equal to 11 times the 11th term, find the 18th term

-33 or 33

Step-by-step explanation:

The seventh term of an AP is written as:

The eleventh term of an AP is written as:

If the 7th term is 11 times the 11th term, then;

Expand to get:

We must have a=-52 and d=5

Or

a=52 and d=-5

For the first case, the 18th term is :

For the second case,

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)

there are no choices to this, can you give us some choices so that i can answer it

step-by-step explanation: