Mathematics

Mathematics

Problem

The region enclosed by the lines

y=x

and

y=4-x

for

0\le x\le 2

is revolved about the horizontal line

y=6

. Which expression gives the outer radius

R(x)

of a typical washer as a function of

x

? a)

x+2

b)

6-x

c)

4-x

d)

6

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