The sum formula is n(n + 1) / 2 > 1000, so n(n + 1) > 2000. Testing values gives 44 x 45 / 2 = 990 and 45 x 46 / 2 = 1035, so smallest n is 45.
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With initial salary of 5,00,000 and annual increment of 20,000, his earnings form an AP. Solving 7,00,000 = 5,00,000 + (n – 1) x 20,000 gives n = 11, meaning his income reaches 7,00,000 after 10 years.
After 3 years, the phone value becomes 7600 rupees. The relation between value and years is v = 10000 minus 800t. It represents linear decay because the value decreases by a fixed 800 rupees every year.
If I add 1,000 to 9,000, I get 10,000. Class 5 Maths Mela Chapter 1 taught me that 10,000 is the next big number after 9,000 when we keep adding thousands. Class 5 NCERT Maths-Mela Chapter 1 We the Travellers — ...
India today is a modern nation with defined borders, states, and a known population, whereas in the past, it had shifting boundaries and different names across time. Class 6 Social Science Chapter 5 India, That is Bharat NCERT Book Exploring ...