Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Find the common  diffrence of an AP whose first term is 5 and the sum of the first four terms is half the sum of the next four terms
Asked by gpnkumar0 | 27 Feb, 2018, 10:26: PM
answered-by-expert Expert Answer
begin mathsize 16px style According space to space the space question straight a equals 5 straight S subscript 4 equals 4 over 2 open square brackets 2 cross times 5 plus 3 straight d close square brackets straight S subscript 4 equals 2 open parentheses 10 plus 3 straight d close parentheses Sum space of space next space four space terms space are space 5 to the power of th space to space 8 to the power of th straight a equals straight t subscript 5 straight t subscript 5 equals 5 plus 4 straight d sum space of space next space 4 space terms equals 4 over 2 open parentheses 2 straight t subscript 5 plus 3 straight d close parentheses equals 2 open square brackets 2 open parentheses 5 plus 4 straight d close parentheses plus 3 straight d close square brackets equals 2 open parentheses 10 plus 11 straight d close parentheses straight S subscript 4 equals 1 half cross times sum space of space next space 4 space terms 2 open parentheses 10 plus 3 straight d close parentheses equals 1 half cross times 2 open parentheses 10 plus 11 straight d close parentheses 20 plus 6 straight d equals 10 plus 11 straight d straight d equals 2 end style
Answered by Sneha shidid | 28 Feb, 2018, 10:00: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
check whether -105 is a term of AP: 11,8,5,2.....
Asked by kumarrishavsingh7 | 17 Oct, 2023, 12:37: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
maths doubt
question image
Asked by dixitayush414 | 04 Jan, 2023, 09:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
The students of a school decided to beautify the school on the Annual Day by fixing colourful flags on the straight passage of the school. They have 27 flags to be fixed at intervals of every 2 m. The flags are stored at the position of the middle most flag. Ruchi was given the responsibility of placing the flags. Ruchi kept her books where the flags were stored. She could carry only one flag at a time. How much distance did she cover in completing this job and returning back to collect her books? What is the maximum distance she travelled carrying a flag
Asked by Dilkhushmohad055 | 28 Dec, 2022, 11:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
A group of men decided to do a job in 8 days. But since 10 men dropped out after 1st day, 2 more men dropped out after 2nd day, 2 more men dropped out after 3rd day and so on, the job got completed at the end of 12th day. How many men were there at the beginning?   55     56     57     58
Asked by 105236 | 31 Aug, 2021, 06:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Show that (a-b)², (a²+b²), (a+b)² are in arithmetic progression.
Asked by apal63216 | 02 Jan, 2021, 07:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Q- The angles of a triangle are in AP . the greatest angle is twice the least . Find all angles of a triangle.
Asked by arindeep.singh | 10 Jul, 2020, 06:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Find three consecutive terms in A.P whose sum is 9 and the product of their cubes is 3375 
Asked by pushpa.Kudle09 | 12 Mar, 2020, 12:37: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Divide 56 into 4 parts which are in AP such that the ratio of product of extreme to the product of the means 5 : 6
Asked by dastirthankar13 | 10 Mar, 2020, 08:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
The angles of a quad in ap. With d=10°.  Can I not take a-3d, a-d, a+d, a+3d as the angles. I am getting the angles as 60,80,100,120!!! Value of a=90° after adding the 4 angles.
Asked by drhimasingh | 26 Dec, 2019, 06:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
The angles of a quand are in A.P with d=10°. Find the angles! (Solution is attached)
Asked by drhimasingh | 26 Dec, 2019, 06:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×