1.

Find the sum: (i) (4-(1)/(n))+(4-(2)/(n))+(4-(3)/(n))+…up to n terms (ii) (a-b)/(a+b)+(3a-2b)/(a+b)+(5a-3b)/(a+b)+…….to20 terms

Answer»


ANSWER :`(i) (7n-1)/(2) (II) (10)/(a+b)(40a-21b)`


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