A1=1 and an=5an-1 than find the value of a4

in the sequence where

Step-by-step explanation:

Here, given

Now, the given  n = 4

So, now here:

⇒Second term of the sequence  = 5

Now,

⇒Third  term of the sequence  = 25

Also, Now,

⇒Forth  term of the sequence  = 125

Hence, in the sequence where

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

y - 25 = 2 ( x - 10 ) should be the answer