അതിനാൽ, നമുക്ക് ഇടതുവശത്ത് ഇതെല്ലാം ഒരുമിച്ച് ശേഖരിക്കാം, നമുക്ക് Δu V ആണ് r3+u 4 π r2 Δr= 4 π r2 Δr, ശരി.
కాబట్టి, వీటన్నింటిని ఎడమ వైపున కలిపి సేకరిద్దాం మరియు మనం కలిగివున్నఅనేది , Now, I can write this cancels from all through .