Question

In the expansion of (x + k)’, where k e R, the coefficient of the term in x5 is 63. Find the possible values of k.

Answer 1

Answer:

Step-by-step explanation:

valid approach (M1)

eg

Pascal’s triangle to row

valid attempt to find value of which gives term in (M1)

eg

identifying required term (may be indicated in expansion) (A1)

eg

correct working (may be seen in expansion) (A1)

eg

3360 A1 N3

[5 marks]

Answer 2

Step-by-step explanation:

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