error in the question? (1 Viewer)

[mathsbrain]

hi all, please see the attachment, i reckon Q5c) is erroneous as a quintic polynomial needs 5 roots, not 4? Am i correct? Also, just to be super sure, Q6a(ii) we need to do y1 - y2 and not y1 + y2 since y2 is under x-axis correct (y1 is the parabola, and y2 is the semicircle)?

 

[deswa1]

lol- I reckon its just a typo. Solve the question assuming it had indicated five roots (i.e. add e as a root as well)

 

[math man]

either there is a double root for 5(c) or they meant it to be a quartic function