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`k=(9)/(5)`**Revision of limits**

**What is continuity what do we mean by it?**

**Continuous graphs or non continuous graphs**

**Definition Condition for continuity**

**Type of Discontinuity - removable or irremovable**

**Find the points of discontinuity of `f(x) = 1 / (2sinx - 1)`**

**Type of Discontinuity**

**Number of point of discontinity point in interval**

**Discuss the differentiability of `f(x) = arc sin 2x / (1 + x^2)`**

**Let f and g be two real functions; continuous at `x = a` Then `f+g` and `f-g` is continuous at `x=a`**