No products in the cart.

The first term of GP is …

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now

The first term of GP is 1 .the sum ofthe third and fifth term is 90. Find the common ratio of GP

Posted by Harshit Raj 4 years, 1 month ago

CBSE > Class 11 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

Let first term be a = 1; and common ratio = d;
Then,
ad² + a d^{4} = 90
=> d⁴ + d² - 90 = 0
=> d⁴ + 10d² - 9d² - 90 = 0
=> (d² - 9) (d² + 10) = 0
=> d² = 9 {Neglecting -10}
=> d = ±3 Hence, the common ratio is ±3.....

0Thank You

ANSWER

Related Questions

What is sin60

Posted by Ullas Cs 1 month, 2 weeks ago

CBSE > Class 11 > Mathematics

4 answers

Find the centre and radius of the circle x2+y2-x+2y-3=0

Posted by Siddhi Jadhav 3 days, 20 hours ago

CBSE > Class 11 > Mathematics

0 answers

For all sets A,B and C Is (A-B) union (C-B)=(A union C)-B?

Posted by Shraddha Mathur 1 month ago

CBSE > Class 11 > Mathematics

0 answers

Option of photo

Posted by Rishi Raj Singh 2 days, 21 hours ago

CBSE > Class 11 > Mathematics

0 answers

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Akshat Singla 3 minutes ago

CBSE > Class 11 > Mathematics

0 answers

Derivative of cube root of tanx

Posted by Adi Manav 1 month, 2 weeks ago

CBSE > Class 11 > Mathematics

0 answers

Using logarithm find the value of: 5.364 ki power whole cube into 49.76 ki power half

Posted by Anant Gautam 2 weeks, 4 days ago

CBSE > Class 11 > Mathematics

0 answers

Solve cos2x -5sinx -3=0

Posted by Prince Kumar 1 month ago

CBSE > Class 11 > Mathematics

0 answers

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Not Fine Bro 🎭 1 month, 1 week ago

CBSE > Class 11 > Mathematics