Plz do both of them for me and even show the work plz

(a)= option 3

(b)= option 3

Step-by-step explanation:

(A) It is given that a sequence is defined by the recursive function   and

Now, substituting the value of n=2 in above equation,

Again putting n=3,

Putting n=4,

Putting n=5,

Putting n=6,

Putting n=7,

Hence, option 3 is correct.

(B) The given sequence is :

5, -10, 20, -40, 80.....

Since, the given sequence is GP, therefore

and r=-2

The nth term is given by:

For fifteenth term, put n=15 in above equation, we get

=

=

Hence, the fifteenth term is 81920.

Option 3 is correct.

11

step-by-step explanation:

32.50-7.50=25

225/25=11

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.