Q.

The sum of the infinite series 1+23+732+1233+1734+2235+.........  is equal to

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a

94

b

114

c

154

d

134

answer is D.

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Detailed Solution

1+132+73+1232+............1+1321-13+ 53(1-13)2                          sum of infinite terms in AGP=  a1-r+ d·r1-r2 1+133+154 =134
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