Which expression is equivalent to 21 × 7?
1 answer:
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It looks like the integral is
where <em>D</em> is the set
<em>D</em> = {(<em>x</em>, <em>y</em>) : 0 ≤ <em>x</em> ≤ 1 and <em>x</em> ² ≤ <em>y</em> ≤ √<em>x</em>}
So we have