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e^(5x)+e^(-5x)=...

`e^(5x)+e^(-5x)=`

A

`1+(5x)/(1!)+((5x)^(2))/(2!)+((5x)^(3))/(3!)+....`

B

`1-(5x)/(1!)+((5x)^(2))/(2!)-((5x)^(3))/(3!)+....`

C

`1+((5x)^(2))/(2!)+((5x)^(4))/(3!)+....`

D

`2[1+((5x)^(2))/(2!)+((5x)^(4))/(4!)+....]`

Text Solution

Verified by Experts

The correct Answer is:
D
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