Use the recursive formulae (derived from chebyshev polynomials)
ta+1(x) = 3t,(7) – (1 - 12u (2)
un+1(i) = tn (2) + xun(1)
to find t5(x) and u5(x) given that t0(x)=1 and u0(x)=0.

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers

42.4

step-by-step explanation:

convert to decimal

a

step-by-step explanation: