find the sum of 50 terms of the sequence 7,7.7,7.77,7.777,..........
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=7(1,1.1,1.11,1.111,........)
multiply and divide by 9
=7/9(9,9.9,........)
hence solve it by putting the value in below formula....
=(a(r^n-1)/r-1)+n
thats it....put the value and get the answer
multiply and divide by 9
=7/9(9,9.9,........)
hence solve it by putting the value in below formula....
=(a(r^n-1)/r-1)+n
thats it....put the value and get the answer
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