A.P & G.P

The nth term of an A.P. is given by an = 3 + 4n. The common difference is

• (a) 7

• (b) 3

• (c) 4

• (d) 1

If the sum of three numbers in an A.P. is 9 and their product is 24, then numbers are.

• 2, 4, 6

• 1, 5, 3

• 2, 8, 4

• 2, 3, 4

If 2x, x + 10, 3x + 2 are in A.P., then x is equal to

• 6

• 9

• -4

• 5

In a GP the 3rd term is 24 and the 6th term is 192. The 10th term is

• 3070

• 3072

• 3068

• 3074

The nth term of a G.P is 128 and the sum of its n terms is 225. If its common ratio is 2, then its first term is

• 1

• 3

• 8

• none of these.

Find the next three terms: -4, -12, -36, -108, ...

• 36, -108, 324
• -324, -972, -2916
• 324, -972, 2916
• -108, 324, -972

Tags

CCSS.HSF.BF.A.2

If the common difference of an AP is 5, then what is a₁₈ – a₁₃?

• 5

• 20

• 25

• 30

Tags

CCSS.HSF.BF.A.2

True or False

Given "a" the first term is negative and "r" the common ratio is positive then all the terms in the geometric sequence will be negative.

• TRUE

• FALSE

2020^th term of an AP is written as

• a + 2019d

• a + (2019 + 1) d

• 2018 d

• 2a + 2018 d

The next term of an AP  $\sqrt{7}$  , $\sqrt{28}$  , $\sqrt{63}$  ,......is 

•  $\sqrt{70}$  

•  $\sqrt{84}$  

•  $\sqrt{98}$  

•  $\sqrt{112}$