If f(1)=1 and f(n)=f(n-1)+2 then find the value of f(6)

Step-by-step explanation:

f(1) = 2 and f(n) = f(n -1) + 2

f(1) = 2

f(2) = f(2 - 1) + 2 = f(1) + 2 = 2 + 2 = 4

f(3) = f(3 - 1) + 2 = f(2) + 2 = 4 + 2 = 6

f(4) = f(4 - 1) + 2 = f(3) + 2 = 6 + 2 = 8

f(5) = f(5 - 1) + 2 = f(4) + 2 = 8 + 2 = 10

f(6) = f(6 - 1) + 2 = f(5) + 2 = 10 + 2 = 12

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: