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RD Chapter 20 Definite Integrals Ex 20.4 Solutions

Question - 1 : -

Answer - 1 : -

We know

Hence

We know

If

Then also

Hence

Question - 2 : -

Answer - 2 : -

We know

Hence

If

Then

Question - 3 : -

Answer - 3 : -

We know

 

Hence

If

Then

so

Question - 4 : -

Answer - 4 : -


We know

Hence

If

Then

Hence

Question - 5 : -

Answer - 5 : -

We know

Hence

If

Then

So

We know

 

If f(x) is even

If f(x) is odd

Here

f(x) is even, hence

Question - 6 : -

Answer - 6 : -

We know

Hence

If

Then

So

Question - 7 : -

Answer - 7 : -

We know

Hence

If

Then

So

Question - 8 : -

Answer - 8 : -

We know

Hence

If

Then

So

Question - 9 : -

Answer - 9 : -


If f(x) is even

If f(x) is odd

Here

 is oddand

 is even. Hence

Question - 10 : -

Answer - 10 : -


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