کیا ہے (sqrt (5+) sqrt (3)) / (sqrt (3+) sqrt (3+) sqrt (5)) - (sqrt (5-) sqrt (3)) / (sqrt (3+) sqrt (3-) sqrt (5))؟
2/7 ہم لے جاتے ہیں، A = (sqrt5 + sqrt3) / (sqrt3 + sqrt3 + sqrt5) - (sqrt5-sqrt3) / (sqrt3 + sqrt3-sqrt5) = (sqrt5 + sqrt3) / (2 sqrt + sqrt5) - (sqrt5 (2 قصر 3-sqrt5) = ((sqrt5 + sqrt3) (2 sqrt5-sqrt5) - (sqrt5-sqrt5) - (sqrt5-sqrt5) - (sqrt5-sqrt3) - (sqrt5 + sqrt3) / (2qq3 + sqrt5) - (sqrt5-sqrt3) / (2 sqrt3 sqrt5) = ((sqrt5 + sqrt3) ) (2 قصر 3 + sqrt5)) / (2sqrt3 + sqrt5) (2qrt3-sqrt5) = ((2sqrt15-5 + 2 * 3-sqrt15) - (2qrt15 + 5-2 * 3-sqrt15)) / ((2sqrt3) ^ 2- (sqrt5) ^ 2) = (منسوخ (2sqrt15) -5 + 2 * 3cancel (-sqrt15) - منسوخ (2sqrt15) -5 + 2 * 3 + منسوخ (sqrt15)) / (12-5) = ( -10 + 12) / 7 = 2/7 یاد رکھیں کہ، اگر ڈومی
آپ کیسے آسان کرتے ہیں (1 / sqrt (a-1) + sqrt (a + 1)) / (1 / sqrt (a + 1) -1 / sqrt (a-1)) div sqrt (a + 1) / ( (A-1) sqrt (a + 1) - (a + 1) sqrt (a-1))، a> 1؟
بھاری ریاضی فارمیٹنگ ...> رنگ (نیلے رنگ) (((1 / sqrt (a-1) + sqrt (a + 1)) / (1 / sqrt (a + 1) -1 / sqrt (a-1)) ) ((sqrt (a + 1) / ((a-1) sqrt (a + 1) - (a + 1) sqrt (a-1))) = color (red) (((1 / sqrt (a- 1) + sqrt (a + 1)) / ((sqrt (a-1) -sqrt (a + 1)) / (sqrt (a + 1) cdot sqrt (a-1))) / (sqrt (a +1 (/ sqrt (a-1) cdot sqrt (a-1) cdot sqrt (a + 1) -sqrt (a + 1) cdot sqrt (a + 1) sqrt (a-1))) = color (1) نیلا) (((1 / sqrt (a-1) + sqrt (a + 1)) / ((sqrt (a-1) -sqrt (a + 1)) / (sqrt (a + 1) cdot sqrt (a -1) ()) / (sqrt (a + 1) / (sqrt (a + 1) cdot sqrt (a-1) (sqrt (a-1) -sqrt (a + 1))) = color (red) ((1 / sqrt (a-1) + sqrt
اظہار کو آسان بنانا؟ 1 / (sqrt (144) + sqrt (145)) + 1 / (sqrt (145) + sqrt (146)) + ... + 1 / (sqrt (168) + sqrt (169))
1 پہلا نوٹ کہ: 1 / (sqrt (n + 1) + sqrt (n)) = (sqrt (n + 1) -sqrt (n)) / ((sqrt (n + 1) + sqrt (n)) ( sqrt (n + 1) -سقر (ن)) رنگ (سفید) (1 / (sqrt (n + 1) + sqrt (n))) = (sqrt (n + 1) -sqrt (n)) / (( n + 1) -n) رنگ (سفید) (1 / (sqrt (n + 1) + sqrt (n))) = sqrt (n + 1) -sqrt (n) تو: 1 / (sqrt (144) + sqrt (145)) + 1 / (sqrt (145) + sqrt (146)) + ... + 1 / (sqrt (168) + sqrt (169)) = (sqrt (145) -sqrt (144)) + (چوڑائی (146) -قرآن (145)) + ... + (sqrt (169) -قرآن (168)) = sqrt (169) -قرآن (144) = 13-12 = 1