Assertion :The sum of first n terms of an A.P. whose first term is A, the second term is B and the last term is L, is equal to 2(B−A)(B+L−2A)(A+L) Reason :If the sim of p terms of an A.P. is equal to the sum of its q terms, then the sum of its (p+q) terms is p+q

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Assertion :The sum of first n terms of an A.P. whose first ter

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Assertion :The sum of first $n$ terms of an A.P. whose first term is $A$ , the second term is $B$ and the last term is $L$ , is equal to $\frac{( B + L - 2 A ) ( A + L )}{2 ( B - A )}$
Reason :If the sim of $p$ terms of an A.P. is equal to the sum of its $q$ terms, then the sum of its $(p + q)$ terms is $p + q$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Assertion is correct but Reason is incorrect

Both Assertion and Reason are incorrect

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Assertion :The sum of first

n

terms of an A.P. whose first term is

A

, the second term is

B

and the last term is

L

, is equal to

\frac{( B + L - 2 A ) ( A + L )}{2 ( B - A )}

Reason :If the sim of

p

terms of an A.P. is equal to the sum of its

q

terms, then the sum of its

(p + q)

terms is

p + q

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