Math, asked by Abi441, 1 year ago

The sum of first three terms of a G.P. is 21 and the sum of their squares is 189.Find the common ratio.
a)1/2 or 2
b)3 or 1/3
c)4 or 1/4
d)none of these

Answers

Answered by anurag109

100 percent correct answer, I am fully sured,the correct answer is 1/2 or 2, therefore (a) is correct answer

anurag109: 4r square -8r-2r+4=0, next step we take 4r common the 4r(r-2)and we take common -2 the -2(r+1

anurag109: sorry for last line

anurag109: 4r(r-2)-2(r-2)=0 next step is (r-2)(4r-2)=0 next step is r=2 or 4r=2 or r=2/4 we get 1/2 therefore your answer and common ratio are 2 and 1/2

anurag109: Aapko jo step samajh nahi aaye wo pooch lena.

anurag109: I request you to please mark it as a brainiest answer early and early

anurag109: bro i get full soln and this is absolutely and 100 percent correct answer ok

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anurag109: please mark it

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The sum of first three terms of a G.P. is 21 and the sum of their squares is 189.Find the common ratio.a)1/2 or 2b)3 or 1/3c)4 or 1/4d)none of these

Answers

The sum of first three terms of a G.P. is 21 and the sum of their squares is 189.Find the common ratio.
a)1/2 or 2
b)3 or 1/3
c)4 or 1/4
d)none of these