# NCERT Class 12-Mathematics: Chapter – 5 Continuity and Differentiability Part 10 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 4**:

**Answer**:

We have,

st

At

And

**Question 5**:

**Answer**:

At

So, is discontinuous at

**Question 6**:

**Answer**:

We have,

At

Since.

So, is continuous at .

**Question 7**:

**Answer**:

We have,

.

At

So, is continuous at