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]]>AP formula hmangin equation siam ila
(n/2)(2a+n-1)=9808, n=no of pages, a=first page no
or, 2a+n-1=19616/n…….(1)
19616=2*2*2*2*2*613
n hi page kan tihthler zat a nih vangin even a ni ngei ngei tur a ni. chuan, n=even
eqn(1)-a LHS: 2a=even, n=even, 2a+n-1=odd.
Chuan, LHS=odd => RHS=odd
RHS=32*613/n odd integer ni tur chuan 19616, n-a kan sem chhuah chu 19616 factor zing a mi odd awm chhun 613 hi a nih ngei ngei a ngai a.
chuan RHS=613 means n=19616/613=32
chhuan eqn(1) hmangin a=291
last page=291+32-1=322 (AP last term)
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