CBSE Tutorials

Sequence and Series   Sequence: A sequence is an arrangement of number in a definite order, according to a definite rule. Terms: Various numbers occurring in a sequence are called terms or element.     Consider the following lists of number:         3, 6, 9, 12, ……………         4, 8, 12, 16, ……………         -3, -2, -1, 0, ……………     In…

Applications of Quadratic Equations   Problem:       The sum of two numbers is 15. If the sum of their reciprocals is , find the numbers.   Solution:        Let the required numbers be x and 15 – x. Then,         According to question, we have                      Þ             Þ             Þ             Þ    150 =         Þ             or             Þ             Þ    …