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Other way factor f^2 multiple times: Step 1: 7^2(7^3 +7^2 + 7+ 1) + 7 Step 2: 7^2(7^2(7 + 1) + 8) + 7 Step 3: 49(49*8 + 8) + 7 Now its clear that content of the bracket reduce to 50 x 8, therefore the final calculation is 49 * ( 400 ) + 1 = 19607
People in the comments section seems to not understand this video, they say they can solve it much faster with a calculator. The things is, this video teach us how to solve a question like this, because a normal person don't know the value of 7⁸ and plus.
This is a question of GP in which a=7,r=7,n=5so Sn=a(r^n-1)
________
r-1
Exactly 💯
S5=7(7^5-1)/(7-1) !!! 😮😁🤣
Other way factor f^2 multiple times:
Step 1: 7^2(7^3 +7^2 + 7+ 1) + 7
Step 2: 7^2(7^2(7 + 1) + 8) + 7
Step 3: 49(49*8 + 8) + 7
Now its clear that content of the bracket reduce to 50 x 8, therefore the final calculation is 49 * ( 400 ) + 1 = 19607
Seems like an awful long way to get the answer
Super
Домножаем на (7-1), получаем 7^6-7...
Ошибка, когда выводила за скобки 50 , проще было бы 7 возвести в пятнадцатую степень на калькуляторе 😃
Why not just multiply 49*50*8 then add 7?
等比数列の和という概念にたどり着けてない。。
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Thank you very much!!!
15
Aplica cociente notable y te evitas la fatiga
I just type it into Matlab Symbolic. I can get a symbolic or numeric answers without hurting my brain.
Тут обычная геометрическая прогрессия. Школьник 6 класса решит.
19,607
People in the comments section seems to not understand this video, they say they can solve it much faster with a calculator. The things is, this video teach us how to solve a question like this, because a normal person don't know the value of 7⁸ and plus.
This can be more easier 49 x 50 x 8 = 49 x 50 x 2 x 4 = 49 x 100 x 4 = 196 x 100 = 19600
I been quit
But for the case is not 'watch hours'
😁
Thanks man, same formula here.
Super simple
11111(base 7) 😅
111110
Faster just to calculate
7 to the power of 15
Be careful + operant not * between the 7 powers.
No !
Are you crazy?? (7^6-1)/6
Dude
There would be a better and easier way...
111110
Lack of basic understanding of tables
19607 по формуле суммы членов геометрической прогрессии.
Ты не понимаешь что будет Много
Chán quá
Гуд
Boring long way to solve a trivial calculation.
У меня получилось намного быстрее - просто я не решал этот бессмысленный пример, неимеющий никакого практического смысла
16807+2401+343+49+7=19607