Area under curve y=f(x) from a to b is represented by what?

A. definite integral

Step 1: Identify the concept: this is application of integrals. Step 2: Area under a curve from limit a to b is found using definite integral. Step 3: Remember area under curve means definite integral.

Step 1: concept पहचानें: यह application of integrals है। Step 2: Curve के नीचे area को limits a से b तक definite integral से निकाला जाता है। Step 3: Area under curve means definite integral याद रखें।