6. Determine whether f is a function from Z to R if [1pt] a) f(n)=tn b) f(n) n+1. 7. [2pts] Find these values. a) 11.1J c) L-0.1J b) Г1.11 d) -0.11 8. 2pts] Determine whether each of these functions from a, b, c,d) to itself is one-to-one. a) f(a)-b, f (b)- a. f (c)- c. f(d)-d b) f(a) b, f(b) b, f(c)-d, f(d)- Determine whether f: Z × Z → Z
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