Question
$\int \limits_{6}^{16} \frac{\log _{ e } x ^{2}}{\log _{ e } x ^{2}+\log _{ e }\left( x ^{2}-44 x +484\right)} dx$ बराबर है
$I=\int_{6}^{16} \frac{\log _{e} x^{2}}{\log _{e} x^{2}+\log _{e}(x-22)^{2}} d x \ldots(1)$
We know
$\int_{a}^{b} f(x) d x=\int_{a}^{b} f(a+b-x)\, d x(\text { king })$
So $I=\int_{6}^{16} \frac{\log _{e}(22-x)^{2}}{\log _{e}(22-x)^{2}+\log _{e}(22-(22-x))^{2}}$
$I=\int_{0}^{16} \frac{\log _{e}(22-x)^{2}}{\log _{e} x^{2}+\log _{e}(22-x)^{2}} \,d x \ldots(2)$
$(1)+(2)$
$2 I=\int_{6}^{16} 1 .\, d x=10$
$I=5$
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