Question: 1. Let f: [1,4] R be defined by f(x) = 4x for 0x 2 and f(x) 2 < x 4. Let P = {-1,0,2,3,4}.

1. Let ( f:[-1,4] ightarrow mathbb{R} ) be defined by ( f(x)=4-x^{2} ) for ( 0 leq x leq 2 ) and ( f(x)=2 x ) fo

3. Let ( f:[0,1] ightarrow mathbb{R} ) with ( f(x)=-2 ) if ( x ) is rational and ( f(x)=1 ) if ( x ) is irration

1. Let f: [1,4] R be defined by f(x) = 4x for 0x 2 and f(x) 2 < x 4. Let P = {-1,0,2,3,4}. Find L(f, P) and U(f, P). = 2x for 2. Let f [0, 1] R be defined by f(x) = -8. Prove, directly from the definition, that f is integrable. 3. Let f: [0, 1] R with f(x) = -2 if x is rational and f(x) = 1 if z is irrational. Prove whether or not f is integrable. 4. Let f [a, b] R be integrable. Use the definition OR the Archimedes-Riemann Theorem to prove directly that -5f is integrable and that b ["^(-5) = (-5) 5) [ f (Be careful, because the constant is negative the sups and infs will switch.)

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ANSWER 1 To find the lower sum Lf P we need to evaluate f at the left endpoint of each subinterval o... View full answer

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