Attachment 25963
Can someone give me a hint for this one ?
It's from Elementary Analysis by Ross.
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Attachment 25963
Can someone give me a hint for this one ?
It's from Elementary Analysis by Ross.
Okay, I tried it. I thought about this:
1. Let h := |f| - f
2. h is continuous on (a,b) (as |f| and f are)
3. 0 <= h <= 2 |f| (as -f <= |f| )
than use 36.6 ?
than integral h exist
than integral h - |f| exist (as |f| exist)
and integral f exist