Matematik Tingkatan 2 bab 1 - 3

1 , 2 , 4 , 7 , 11 , ___ , ____

• 14 , 17

• 15, 18

• 16 , 21

• 16 , 22

Describe the pattern in the sequence. Find the next three terms.

4, 8, 16, 32, ...

• Multiply by 2; 64, 128, 256.

• Multiply by –2; –64, 128, –256.

• Multiply by 2; 128, 256, 512.

• Add 2; 34, 36, 38.

The table shows the predicted growth of a particular bacteria after various numbers of hours. Write an explicit formula for the sequence of the number of bacteria.

• T_n = 19n + 19

• T_n = n + 19

• T_n = 1/19 n

• T_n = 19n

Suppose you drop a tennis ball from a height of 15 feet. After the ball hits the floor, it rebounds to 85% of its previous height. How high will the ball rebound after its third bounce? Round to the nearest tenth.

• 9.2 feet

• 10.8 feet

• 7.8 feet

• 1.9 feet

A large asteroid crashed into a moon of a planet, causing several boulders from the moon to be propelled into space toward the planet. Astronomers were able to measure the speed of one of the projectiles. The distance (in feet) that the projectile traveled each second, starting with the first second, was given by the arithmetic sequence 26, 44, 62, 80, . . . . Find the total distance that the projectile traveled in seven seconds.

• 534 feet

• 560 feet

• 212 feet

• 426 feet

Find the 50th term of the sequence 5, –2, –9, –16, ...

• –352

• –343

• –338

• –331

Considering the following pattern

2 x (2 - 1) = 2,

3 x (3 - 1) = 6,

4 x (4 - 1) = 12,

5 x (5 - 1) = 20, the 8^th line in the pattern will be

• 9 x (9 - 1) = 72

• 8 x (8 - 1) = 56

• 7 x (8 - 1) = 49

• 10 x (10 - 1) = 90

How many triangles are in a figure with 10 sides?

• 7

• 8

• 9

• 10