Which integral that cannot be solved by the substitution method? Integral mana yang tidak dapat diselesaikan dengan menggunakan metode substitusi? S tan(x) dx 1. O Sx (x² + 1)100 dx 2. O S(x² + 1)² dx 3. O sin(x) dx cos³(x) 4. O

Decide whether you can find each integral using the formulas and techniques you have studied so far. Explain. (a) ∫2dx / √(x2 + 4)        (b) ∫dx/x√(x2 − 9)

6. - dx Find 1