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`int (e^(x) (1 +x))/(cos^(2)(xe^(x)))dx` का मान ज्ञात कीजिये । |
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Answer» माना `I = int (e^(x) (1+x))/(cos^(2) (xe^(x)))dx` माना ` xe^(x) = t` `therefore" "(e^(x) + ex^(x)) dx = dt` `rArr" "e^(x)(1+ x)dx =dt` `therefore" " I= int(dt)/(cos^(2)t) = int sec^(2) t dt = tan t` `therefore " " I = tan (xe^(x))` |
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