FUNCTIONS-4

If f(x) = |x - 9| evaluate f(-27)

solution

f(x) = |x - 9|

f(-27) = |-27 - 9|

f(-27) = |-36| = 36 since ay number out of absolute signs is +ve.

Hence f(-27) = 36

TRY THIS..................

NECTA 1997 QN. 3b (i)

If f(x) = |x - 7| evaluate f(-27)