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Okay guys.... I have trouble with 5a... can anyone help me with this question?

this question is wrong, and answer provided is also wrong, u wont get dj/dt if u differentiate j function, and this questions wants to use integral as the reverse of differentiation concept, and not adding +c, and they want u to substitute 2, which is totally wrong.

if u dont consider the function J above and just focus to 3b, u should use definite integral, and u should integrate from 1 to 2, or u can also integrate from 0 to 2 and minus 0 to 1. and the correct answer would be 3950 liters.

I guess because the side length of triangle A & B are not the same even though it have the same interior angles , C is another case .

Level 2: replace 81 with a and 30 with b.

Express x in terms of a and b.

those who said yes, dont forget to check again for the meaning of congruent.

1st category, u want to score around 10-15 so, for SPM u get LULUS for addmaths,
focus on these chapters
f4(1,2,3,6,10)
if possible study f5(1,7) (can score above 20)

2nd category, u want to score around 20-35 for spm so u get KREDIT for addmaths,
focus on these chapters
f4(1,2,3,6,10)
f5(1,7)
if possible try to study f5c2,f5c6 (can score above 40)

3rd category, u want to score around 45-65 for spm so u get B or A for addmaths
focus on these chapters
f4(1,2,3,4,6,7,9,10)
f5(1,2,6,7,8)
if possible try to study f4c5,f4c8, f5c3,f5c5, (can score above 75)

4th category u want to score around 75-100 for SPM so u get A+ for addmaths
study all
its up to u to not study 1 or 2 chapters maximum.

Kategori pertama, anda ingin mendapat skor sekitar 10-15 jadi, untuk SPM anda dapat LULUS untuk matematik tambahan,
fokus pada bab-bab ini
f4(1,2,3,6,10)
jika boleh belajar f5(1,7) (boleh mendapat skor di atas 20)

Kategori kedua, anda ingin mendapat skor sekitar 20-35 untuk SPM jadi anda dapat KREDIT untuk matematik tambahan,
fokus pada bab-bab ini
f4(1,2,3,6,10)
f5(1,7)
jika boleh cuba belajar f5c2,f5c6 (boleh mendapat skor di atas 40)

Kategori ketiga, anda ingin mendapat skor sekitar 45-65 untuk SPM jadi anda dapat B atau A untuk matematik tambahan
fokus pada bab-bab ini
f4(1,2,3,4,6,7,9,10)
f5(1,2,6,7,8)
jika boleh cuba belajar f4c5,f4c8, f5c3,f5c5, (boleh mendapat skor di atas 75)

Kategori keempat, anda ingin mendapat skor sekitar 75-100 untuk SPM jadi anda dapat A+ untuk matematik tambahan
belajar semua
terpulang kepada anda untuk tidak belajar 1 atau 2 bab maksimum.

A challenge for anyone who have studied f5c6, Find the problem in this video.

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these 2 are the most easiest chapters in addmaths, master these 2 if you want to pass.