0 like 0 dislike
19 views
$1 ; y ; b$ are the first 3 terms of an arithmetic sequence and $ 1; x ; b$ are the first 3 terms of a geometric sequence. Prove that: $$2y = x^{2} + 1$$
in Grade 12 Maths by Diamond (37.9k points) | 19 views

1 Answer

0 like 0 dislike
For arithmetic, y-1=b-y , common difference

for geometric seq, x/1 = b/x , constant ratio

                                b=x^2

Then subst b into arithmetic, y-1=x^2-y

                                               2y=x^2 + 1  , proven
by Silver Status (28.5k points)

Related questions

Welcome to MathsGee Open Question and Answer Bank, a platform, where you can ask Maths and Science questions and receive answers from other members of the community. Help is always 100% FREE!
MathsGee QnA is the knowledge-sharing community where millions of students and experts put their heads together to crack their toughest homework questions.

Enter your email address: