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13 May, 19:08

The first term of an arithmetic sequence is 4 & the tenth term is 67 what is the common different?

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  1. 13 May, 21:26
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    An=a1+d (n-1)

    a1=first term

    d=common differntce

    a1=4

    a10=67

    a10=4+d (10-1)

    67=4+d (9)

    minus 4 both sides

    63=9d

    divide both sides by 9

    7=d

    common differnee is 7
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