Q5 · 2020 · Technology-activeSimple familiar1 mark
QUESTION 5
The gradient of the tangent at point A on the curve is .
The -coordinate of A is
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
Implicit differentiation gives , so . Set to obtain . Then , so .
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.
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