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 34 zadania z tego arkusza, razem 110 punktów, każde z kluczem i schematem punktowania.
Find a and b.
Use this model to estimate the energy use of a 12-hour cycle.
Calculate VX.
Calculate AC.
Find the angle between edge VC and the base, in degrees.
Find the intervals on which f is decreasing.
Find the interval on which its graph is concave up.
Find the value of the equipment after nine years, to two decimal places.
How many complete months must pass before the purchasing power of the reserve first exceeds €36 000?
Find its maximum speed over this interval.
Find the total distance travelled during these 5.5 seconds.
Find the acceleration when the shuttle reverses direction for the second time after it starts.
A circular window is divided by chord AB. Its minor segment P has area 18 cm2. The triangle OAB, labelled Q, and segment P have areas in the ratio P : Q = 2 : 3. The circle has centre O, radius r cm, and with 0 < θ < π.…
Find the second term of the geometric sequence.
Find the greatest possible value of Sn, to two decimal places.
A record of completed assembly units has the following frequency distribution, where p, q are positive integers. Its population mean is 27 and its population variance is 153. Determine p and q.
Show that P1 has equation 2x − y + z = 0.
Three planes are P1 : 2x − y + z = 0, P2 : x + by + 2z = 5 and P3 : 3x + y + 3z = d, where b, d > 0. They have a common line. Find b and d.
Find P(R < 990).
The highest 15% of resistances exceed r ohms. Find r to four significant figures.
What percentage of resistors pass inspection?
Find the probability that a tray contains at least 20 resistors that pass.
Find the probability that exactly three trays in a batch each contain at least 20 passing resistors.
At a second factory resistance is normal with unknown mean μ and standard deviation σ. Exactly 84% pass the same inspection thresholds. The fraction below 990 Ω is three times the fraction above 1030 Ω. Find μ.
How many different divisions of the samples into three groups are possible?
Show that for a > 0, .
(i) Use l’Hôpital’s rule to evaluate . (ii) Hence use the density condition to find k.
Find the median total measurement time.
Use implicit differentiation to establish .
Hence find the full set of x-coordinates on C in the form , with positive integer a.
Find the coordinates of A.
A line y = mx, where m is an integer, is tangent to C. Determine every possible m.
The tangent y = −5x touches C at B. Find yB.
The tangent y = −5x touches C at B = (xB, yB). The region between the vertical line x = −1 and the left-hand arc of C, from height yB to height yA, is rotated once about x = −1. Find the resulting volume.
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