Find the value of x when …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Anjali Patel 6 years, 5 months ago
- 1 answers
Related Questions
Posted by Ashish Chaudhary 1 year, 1 month ago
- 1 answers
Posted by Manoj Thakur 1 year, 1 month ago
- 0 answers
Posted by Sana Dharwad 1 year, 1 month ago
- 0 answers
Posted by Sethpoulou Apoulou 1 year, 1 month ago
- 0 answers
Posted by Ananya Sv 1 year, 1 month ago
- 1 answers
Posted by Gurleen Kaur 1 year, 1 month ago
- 0 answers
Posted by Sabin Sultana 1 year, 1 month ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Gaurav Seth 6 years, 5 months ago
2 + 6 + 10 + ...... x = 1800
here ; 2, 6, 10 , .....x are in arithematic progression where 2 is first term and 4 is common difference of ap.
use formula, to find number of terms in ap.
x = 2 + (n - 1) × 4
x = 2 + 4n - 4
x = 4n - 2
x + 2 = 4n
n = (x + 2)/4
now, use formula,
here,
1800 = {(x + 2)/4}/2 [2 + x ]
1800 = (x + 2)/8 × (x + 2)
1800 × 8 = (x + 2)²
14400 = (x + 2)²
(120)² = (x + 2)²
x + 2 = 120 => x = 118
3Thank You