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Question

If 114+124+134+..........+ to =π490,then114+134+154+..........+to is equals to

A
π496
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B
π445
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C
π490
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D
none of these
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Solution

The correct option is A π496
114+134+154+...+
=(114+124+134+...+)(124+144+...+)
=π490116(114+124+134+...+)
=π490116.π490=π496

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