Question

A sequence is defined by the equations

Answer 1

Answer:

34

Step-by-step explanation:

a1 =50

an=an-1+(-4)

then a5=?

putting n =5

a5=a(5-1)+(-4)

a5= a4+(-4)

first let's find d i.ecommon difference by finding a2 and a3

a2 = a(2-1)+(-4). ( by putting value of n=2 in an )

a2= a1+(-4)

a2= 50-4

a2=46

similarly

a3=a(3-1)+(-4)

a3=a2+(-4)

a3= 46-4

a3=42

now a4 =a(4-1)+(-4)

a4= a3+(-4)

a4=42-4

a4=38

now a5=a4+(-4)

a5=38+(-4)

a5=34 Ans