1.

Find the eleventh term from the last term of an AP :27,23,19,....,65

Answer» an =l-(n-1)da=27d=-4l=65a11=65-(11-1)(-4)a11=65+40a11=105
By the ap formula an=a+(n-1)d. Ans=105
an=a+(n-1)d.
Use that formula an = l-(n-1)d
an=l +(n-1)d wala formula apply hoga


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