2:59 16 Derivatives Unit 2 Test 57 Done 10 10 Comm Think Derivatives Unit 2 Test 12 App Knowledge/Understanding 16 marks) Indicate whether the statement is true orfalse. l. The value Of the derivative at a point on a function the Of the tangent to thc curve at that point. 2. The acceleration function is round by differentiating the displacement function twice. 3. The derivative Of a Bilynomial function is always another mlynomial fijnction. 4. The B'Wer rule only works With integer exponents. S. The sign. positive or negative. of the velocity Of an at a time indicates the direction in Which the Object is moving. 6. An is slowing down When the acceleration Of the Olject is in the opposite direction Of its rnotion. Differentiate thc following: (2 marks each) 7. y 5.x-2 + 9x 9. (7x-2) (l ) Cay-2)+ 11. 50 Communication (10 marks) Y 2x+6 10. f(x) = l. function Ofa particle is given by + 3. where time, t. is in seconds. s. is in nxtres, and t 0, Find thc velocity Of thc When thc acceleration is (6 marks) ' -24++46 mcce1erq4m sl(Ll)