If y=5/2(e^(x/5)+e^(-x/5)), then prove that y''=y/25
Ok can someone just check with me.. I'm pretty close to the answer but i don't know what I did wrong ..
the final answer of y''=y/25.. I have
Don't know what happened to the 5/2 in y and.. the denominator is almost there but not quite. ^.^
Please explain your method to proving this. Thank you so much!