Zadanie 1a
On the same axes, sketch and label y=F₁(x) and y=F₂(x), showing all axis intercepts.
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 16 zadań z tego arkusza, razem 55 punktów, każde z kluczem i schematem punktowania.
On the same axes, sketch and label y=F₁(x) and y=F₂(x), showing all axis intercepts.
Find the maximum values of (i) F₁; (ii) F₂; (iii) F₃.
Find the least positive integer n for which the maximum of Fₙ is less than 0.45.
By solving F2′(x) = 0, prove that F₂ has exactly two stationary points on the stated domain, at x = π/2 and x = 3π/2.
The derivative can be written . Use this formula to express F₃′ entirely in terms of x.
Use mathematical induction to prove for all positive integers n.
For each fixed positive integer n, use l’Hôpital’s rule to prove .
For |x|<1, find the sum to infinity of 1 − x2 + x4 − x6 + ⋯.
Hence use integration to establish for |x|<1.
Use the first three nonzero terms of the arctan series at x=a to approximate π, to three decimal places.
Find the smallest number N of nonzero arctan terms giving an absolute error less than 10⁻⁵ when approximating arctan a. Use the alternating-series bound or directly compare the actual errors.
Use integration by parts to show that I = (1 + a2)π/8 − a.
Evaluate to six decimal places.
Using I = (1 + a2)π/8 − a and the approximation , estimate π to four decimal places.
The approximation is a sum of four alternating integrated terms. Verify numerically that its actual absolute error in approximating I is no greater than the next integrated term.
Find the smallest N for which . Use the alternating-series bound or directly compare the actual errors.
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