Understanding Functions and Matrices in Mathematics
Classified in Mathematics
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1. f : A → R means that the codomain of f is A and its domain is R.
FALSE: Domain is A; codomain is R
2. Points of form (x, f(x)), x ∈ A, belong to the graph of function f : B → A, where A ̸= B are non-empty subsets of R.
3. A function f defined on R is called strictly increasing if f(x1) > f(x2) holds, whenever x1> x2.
FALSE: A function, is strictly increasing if f(x0) < f(x1) whenever x0 < x1.
4. The derivative fʹ(a) of f at a is the slope of the tangent line to the graph of f at (a,f(a)).
TRUE: y = f (x) at a point x = c on the curve if the line passes through the point (c, f (c)) on the curve and has slope f '(c) where f ' is the derivative of f.
5. If fʹ(a) ≥ 0, then f is strictly increasing in a neighbourhood of a.
FALSE: