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Since $(0.5, 1)$ and $(1.5, 1)$ are on the graph of $f(x) = a⌈b(x-c)⌉ + d$, this means:
\[f(0.5) = a⌈b(0.5-c)⌉ + d = 1\]
\[f(1.5) = a⌈b(1.5-c)⌉ + d = 1\]
If b = 1, then:
\[a⌈0.5-c⌉ + d = 1\]
\[a⌈1.5-c⌉ + d = 1\]
Subtracting,
\[(⌈1.5-c⌉ - ⌈0.5-c⌉) a =0\]
Using $⌈0.5-c⌉=⌈1.5-c⌉ - 1$,
\[a=0\]which is not allowed.
So, it is not possible for $b = 1$. |
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