Question

find which of the following are not GP (1) 6,12,24,48,.... (2) 1,4,9,16..... (3) 1,-1,1,-1,..... (4) -4,-20,-100,-500,...​

Answer 1

Answer:

Heya the answer is

option 4.........

hope it helps

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Answer 2

Answer:

2nd (1,4,9,16....) is not Gp

Step-by-step explanation:

1. 6,12,24,48 .........

G.p ↔ geometric progressions

a1 = 6 , a2=12, a3=24, a2=48

R↪ a2/a1 =12/6. R↪ a3/a2=48/24

=2. =2

•

• • since common ratio is same , they form a Gp.

⏩⏩3 and 4 are also Gp.

2. 1,4,9,16..…..

G.p↔geometric progressions

a1=1, a2 =4. a3= 9. a2=4

R ➖ a2/a1=4/1. R ➖a3/ a2 =9/4

=4. =9/4

•

• • since it is not in Gp.

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