eagle SG you cannot divide by p% because the p% is calculated over r for percentage change in V, the percentage is calculated over V Instead, you should do the following: There's a more elegant way. I see if I remember then I post it out
eagle SG Question 3: P reduce to x > 2 Q: 2x²-3x-9 < 0 (2x+3)(x-3) < 0 Hence, -1.5 < x < 3 Q': -4 < x < -1.5, 3 <= x <= 4 Draw on number line to see the intersection Answer should be 3 <= x <= 4
Y_Shun SG answer bingo~ i reduced to the same... i guess my number line suck...thats why cannot see the ans ty ty alot!
eagle SG actually if you can visualise, no need number line also can number line is for the tired marker to see it more clearly
eagle SG I do teach maths tuition for sec sch to JC a few years ago Now lost 50% of power liao, so never go teach le
