Zadanie 1a
Find a and b.
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 23 zadania z tego arkusza, razem 80 punktów, każde z kluczem i schematem punktowania.
Find a and b.
State the Pearson correlation coefficient.
Predict the output at input 25, to the nearest integer.
Find ∠BAC.
Find AB.
Find the coordinates of A.
Find the x-coordinate of B.
Find the total area between the graph and the x-axis from x=0 to x=2.
A geometric sequence begins with 80 and has fourth term 121.67. Let Sₙ be the sum of its first n terms. Find the least positive integer n for which Sₙ>12000.
A collection of unprocessed archival files shrinks according to N(t) = 24000ekt, k<0, where t is the number of years after 1 January 2017. By 1 January 2023,14% of the initial files had been processed. Estimate the number remaining on 1 January 2036.
For a≠0, the coefficient of x3 in (1 + ax)8/(14x2) is 12a4. Find a.
Find the initial displacement.
Find the velocity at t=2.
Find the intervals when the particle moves away from the reference point.
The acceleration vanishes at two times b<c. Find b and c.
Let b<c be the two zeros of s″ on the given interval. Find the distance travelled between b and c.
Show that the kite has area .
(i) Find ∠DOE in terms of α. (ii) Find the area of R.
Find α when the area of R is half the area of the original circle.
Find P(T>48).
Four cycles are checked in order. Find the probability that only the fourth lasts longer than 48 minutes.
A large collection contains only cycles longer than 48 minutes. (i) Find the probability that a randomly chosen cycle from this collection lasts less than 62 minutes. (ii) Twelve cycles are independently selected from the collection. Find the probability that…
Thresholds a<b satisfy P(a≤T≤b)=0.88 and P(T>b)=2P(T<a). Find the lower threshold a.
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