Find the sum of given series Sn-4-44-444-4444- - n termsA- 4-910-910n-1-1-nB- 4-91010n-1-nC- 4-910n-1- n D- 4-910-910n-1- n

The correct option is D Reverse Gear Approach Assume n= 1, then S_1 nbsp;=4 Now put n=1in options.Eliminate those options , where you are not getting 4. Onl ...

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Question

Find the sum of given series $S_{n}$ = 4 + 44 + 444 + 4444 + ...................n terms

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Solution

The correct option is B

Reverse Gear Approach
Assume n= 1, then $S_{1}$ =4
Now put n=1in options.Eliminate those options , where you are not getting 4.
Only option (b) will give 4.

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Find the sum of given series Sn = 4 + 44 + 444 + 4444 + ...................n terms

The correct option is B Reverse Gear Approach Assume n= 1, then S1 =4 Now put n=1in options.Eliminate those options , where you are not getting 4. Only option (b) will give 4.

Find the sum of given series $S_{n}$ = 4 + 44 + 444 + 4444 + ...................n terms

The correct option is B

Reverse Gear Approach
Assume n= 1, then $S_{1}$ =4
Now put n=1in options.Eliminate those options , where you are not getting 4.
Only option (b) will give 4.