1.

Let \(f\left( x \right) = \mathop \smallint \nolimits_0^x g\left( t \right)dt\), where g is a non-zero even function. If f(x + 5) = g(x), then \(\mathop \smallint \nolimits_0^x f\left( t \right)dt\) equals:

A. \(\mathop \smallint \nolimits_{x + 5}^5 g\left( t \right)dt\)
B. \(\mathop \smallint \nolimits_5^{x + 5} g\left( t \right)dt\)
C. \(2\mathop \smallint \nolimits_5^{x + 5} g\left( t \right)dt\)
D. \(5\mathop \smallint \nolimits_{x + 5}^5 g\left( t \right)dt\)
Answer» B. \(\mathop \smallint \nolimits_5^{x + 5} g\left( t \right)dt\)


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