Zadanie 1
Let g(x) = e2x²−1 for real x. Find g′(−2).
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 26 zadań z tego arkusza, razem 110 punktów, każde z kluczem i schematem punktowania.
Let g(x) = e2x²−1 for real x. Find g′(−2).
Find (i) the centre of the lower base; (ii) its radius.
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Find the largest a in terms of k when π < k < 3π/2.
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Solve f(x)=0.
(i) Find f′(x). (ii) Hence find all points on the graph where f′(x) = 0, including the endpoints when appropriate.
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Hence or otherwise solve ∣f(x)∣ > 1.
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Suppose x2 − 3x + 2 is a factor of P. (i) Express b in terms of a. (ii) Hence show that a=5,b=8,c=4 is the only permitted assignment. (iii) Factor P completely into linear factors. (iv) Sketch y=P(x), labelling all intercepts.
(i) Find . (ii) Give in terms of n.
(i) Prove for a,b>0 with ab<1. (ii) Hence or otherwise show that .
Prove by mathematical induction that for every integer n≥0. You may use when a,b>0 and ab<1.
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