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@Apu
Note for OP
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(Draw graph for better understanding.)
f'(x)=6x^2+2(2p-7)x+3(2p-9). This has one root <0 and another >0. So, f(0)<0 That is p<9/2 and D>0 giving another condition. So answer must be (d) I think
we good?
No the answer was b
-infinity to 9/2
Ig ki for some reason they've only taken the p<9/2
No its just that when you take D>0 condition and take union it comes out to be (b).
(Also I solved that incorrectly in the first solution)
did we follow what lance said?
+solved @SirLancelotDuLac
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