Zadanie 3a
Show that .
Expand a binomial with a positive integer power and determine individual coefficients or terms.
Tę umiejętność sprawdza 19 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Show that .
Find m.
Expand (1 + t)4 and collect like powers of t.
Hence or otherwise, find the balance after one year, rounded to the nearest dollar.
How many nonzero terms does the fully expanded expression contain?
The coefficient of x5 is 36288. Find k.
In the expansion of (3x + k)8, where k is an integer, the coefficient of x4 equals 9.072 × 104. Find all possible values of k.
The coefficient of x5/2 in is −61236. Find the integer k.
Find the coefficient of x7 in (4x − 3)10.
Find the coefficient of x5 in (3x − 2)8.
Find expressions in h for (i) a; (ii) b; (iii) d.
Find h.
For a,b>0, the coefficient of x⁴ in (ax2 + b)7 is 6048, and its coefficient in (ax2 + b)9 is 41472. Find a and b.
The expansion of (1 + kx)n begins 1 + 15x + 45k2x2 + ⋯ + knxn, with positive integer n and rational k. Find n and k.
The expansion of (1 + kx)n begins 1 + 15x + 45k2x2 + ⋯ + knxn, with positive integer n and rational k. Find n and k.
Show that b=40.
The third term is the arithmetic mean of the second and fourth terms. Find all possible x.
(i) Expand (1 + a)3 in ascending powers of a. (ii) Use an appropriate substitution to show that .
For a≠0, the coefficient of x3 in (1 + ax)8/(14x2) is 12a4. Find a.
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