Question

If X1,X2,X3,28 are A.P where X1=16 then find the value of X3 ?
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Answer 1

Answer:

$to \: find \: common \: difference \: \\ 28 - 16 \div 2 \\ \\ 4$

$common \:difference \: is4 \\ so \: 16 + 2(4) \\ 16 + 8 \\ 24$

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