ARITHMETIC PROGRESSION

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

•  $\sqrt{70}$  

•  $\sqrt{84}$  

•  $\sqrt{98}$  

•  $\sqrt{112}$  

If the nth term of an AP is (2n+1) then the sum of its first three terms is

• 6n+3

• 15

• 12

• 21

If 4, x₁,x₂,x₃,28 are in AP then x₃ is ______

• 19

• 23

• 22

• cannot be determined.

The sum of first 'n' terms of an AP is (3n²+6n). The common difference of the AP is ______

• 6

• 9

• 15

• -3

The 5^th term of an AP is -3 and its common difference is -4. The sum of its first 10 terms is_________

• 50

• -50

• 30

• -30

The 13^th term of an AP is 4 times its 3^rd term. If its 5^th term is 16 then the sum of its first ten terms is _______

• 150

• 175

• 160

• 135

The common difference of the AP  $\frac{1}{p}$ , $\frac{1-p}{p}$  , $\frac{1-2p}{p}$  ........is

• p

• -p

• -1

• 1

Which term of an AP 72, 63, 54, ...... is 0 ?

• 8^th

• 9^th

• 10^th

• 11^th

The sum of first n odd natural numbers is _____

• 2n-1

• 2n+1

• n²

• n² - 1

The first and last terms of an AP are 1 and 11. If the sum of its terms is 36, then the number of terms will be _______

• 5

• 6

• 7

• 8